The gametes are the haploid phase of the animals life cycle. Which of the following statements about the process of meiosis is correct_____ A. Homologous chromosome association occurs before chromosome duplication. It requires the development of organs such as the uterus, which are of no immediate survival advantage to the individual but are advantageous to the species. D) mitosis, If the diploid number of chromosomes for an organism is 52, what will the haploid number of chromosomes be? B) 48 During metaphase I of meiosis the duplicated chromosomes are at the metaphase plate while during metaphase of mitosis the bivalents are present at the metaphase plate C. During metaphase of mitosis the homologues separate while during metaphase I of meiosis the sister chromatids separate D. During metaphase I of meiosis the homologues separate while during metaphase of mitosis the sister chromatids separate, During which phase of mitosis and meiosis will the state of the chromosome be the same? polyploids with chromosomes derived from different species, deletion of a gene for transcription factor active in the central nervous system, What is used to confirm Cri-du-chat syndrome, under developed larynx and severe mental retardation, CF diagnosis in children is usually made how, either because of malabsorption of food leading to failure to thrive or reoccurring respiratory infections, What disease kills more children than any other disorder, Most male CF patients are sterile because, CF patients show a ____________________ insufficiency, the pancreatic insufficiency in CF patients causes what, food to be poorly absorbed because the pancreatic enzymes fail to reach the intestines, a drug that increases the movement of CTFR to the cell surface or ivacaftor, for a specific mutation it alters protein folding, where a diploid organism has only a single functional copy of a gene and the single functional copy of the gene does not produce enough gene product to bring about a wild-type condition, p is the _______________ arm on a chromosome, q is the _______________ arm on a chromosome, # chromosomes, sex chromosomes, autosomal abnormality, t/f: Down syndrome is the most common chromosomal abnormality, the major gene impacting downs syndrome is on, meiotic non disjunction leading to trisomy 21 All are functional. Which of the following statements about mitosis is not true? D. Sister chromatids fail to separate during meiosis I. synapsis occurs during prophase I. Each homologue's centromere splits to form two chromosomes. A. During which stage of meiosis does crossing-over occur? B) structures that hold the chromosomes in alignment on the metaphase plate During ________, the homologous chromosome pairs independently align themselves at the equator of the cell. which trisomies are the ones that survives to term? True or False, Which of the following is NOT a difference between anaphase 1 and anaphase 11, anaphase 1 occurs in a haploid cell while anaphase 11 occurs in a diploid cell, The picture depicts which of the following changes in chromosome structure. Identify which event will occur during Prophase I of meiosis but does not occur during prophase of mitosis. What is the specific term that describes the loss of a single chromosome (2n - 1)? D. It is the first stage of mitosis. C)spermatogenesis. species Y should have a better chance of surviving than species X. in human females, when is meiosis 11 completed? sperm and egg are reproductive cells that are collectively referred to as, which term refers to the failure of homologous chromosomes to separate during meiosis, crossing over occurs between the two sister chromatids of a homologue B) immediately after the sperm penetrates the secondary oocyte E) None of the choices are sources of genetic variation. B. reduction of chromosome number (from 2N to N). All of the following are true about the chromosomes of a multicellular organism EXCEPT: They undergo "endomitosis" where one extra chromosome replication results in a tetraploid cell before meiosis begins. D. They allow a reduction in chromosomes while preserving most of the cytoplasm for one egg. C) two nuclear divisions All of the following are true about the chromosomes of a multicellular organism EXCEPT: Each chromosome separates into two daughter chromosomes by binary fisson. Which of the following normally results from meiosis in a human cell that contains 46 chromosomes? Which statement below best describes the difference between mitosis and cytokinesis? Interkinesis is different from interphase in which way? B. C. Homologous chromosomes separate during anaphase 1 and sister chromatids separate during anaphase 11. When the environment changes, then D. spermatogenesis. There is a species of desert lizard where only females are known to exist-there are no males known. usually an exchange of material between nonhomologous chromosomes. Which body system develops first in a human embryo? Which of the following events does not occur during telophase. E) telophase I, During which stage of meiosis do the homologous chromosomes separate? Identify which event will occur during Prophase I of meiosis but does not occur during prophase of mitosis. body parts being shaped and patterned into a specific form. The S phase is the second phase of interphase, during which the DNA of . B. Homologous chromosomes separate and go to different daughter cells. a nonfunctional cell rudiment formed at the same time as an egg cell. B. carry the same alleles for all traits. " During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis" (The Biology Project, 1997b, para 2). Errors in Meiosis. Before the time of Gregor Mendel and genetics, sexual reproduction was thought to produce a blending or equal mixing of the parents' traits. homozygous . A. prophase 1 B. metaphase 2 C. anaphase 2 D.telophase 2 QUESTION 3 What is the next phase? CompetingSpecies\text{\red{Competing Species}}CompetingSpecies A Lotka-Volterra model in which two species compete for the same source of food (as in Exercise 9) can be described by the system of differential equations, dx1dt=r1x1(1x1k1b1x2k1)dx2dt=r2x2(1x2k2b2x1k2).\begin{aligned} B) reduction of chromosome number (from 2n to n). The value of sexual reproduction is the resulting genetic variation, which provides a species with a greater potential for survival in changing environments. A. C. In mitosis, there are two daughter cells. offspring inherit essentially 50% of their genes from each parent, but two sibling offspring may share with each other from zero to 23 chromosomes in common from each parent, and further variation may occur due to crossing-over. C. Interphase involves DNA replication and interkinesis does not. A lattice holds the members of a bivalent together in such a way that the RNA of the nonsister chromatids is aligned. 19. B) a precursor cell that becomes an egg cell. B ) All siblings from the same parents are identical to each other and demonstrate traits that are exactly halfway between their parents ' traits . Describe the main differences between anaphase of mitosis and anaphase I in meiosis. At which stage of meiosis is each chromosome composed of a single chromatid? It is estimated that an average of two or three cross-overs occur per human chromosome. A) They nurse the egg as it leaves the follicle. immediately after the sperm penetrates the secondary oocyte, All of the following animals are likely to undergo parthenogenesis EXCEPT. B) prophase II and prophase Just like in mitosis, during prophase, DNA condensation occurs, the nuclear envelope and nucleoli disappear, and the spindle starts to form. The haploid cells are genetically different from each other due to crossing over in Prophase I and independent assortment in Anaphase I. Which of the following statements correctly compares the events of meiosis and mitosis? Why is crossing-over important? What is the probable evolutionary mechanism for this occurring? d.) chromosomes replicate. The two chromosomes contain the same genes, but may have different forms of the genes. E) In meiosis, the daughter cells are genetically identical. Ed Reschke/Photolibrary/Getty Images. A. crossing over B. nuclear envelope dissolves C. chromatin condenses into chromosomes D. centrioles appear in animal cells, During _______________ the homologous chromosome pairs separate in a random fashion leading to genetic diversity among the offspring. C) They carry genes for the same traits. Identify which event will occur during prophase I of meiosis but does not occur during prophase of mitosis. A) During metaphase I of meiosis, the bivalents are present at the metaphase plate; during metaphase of mitosis, the duplicated chromosomes are at the metaphase plate. Compare the wavelength and energy of this wave to those of a second wave with a frequency of 1017Hz10^{17} \mathrm{~Hz}1017Hz. A. prophase I of meiosis I B. anaphase I of meiosis II C. telophase I of meiosis I D. prophase II of meiosis II E. anaphase II of meiosis I. Homologous chromosomes are similar in all of these characteristics EXCEPT: A. similar in size. A) at ovulation c. reproduction in some species asexual . Atweeks, the fetal heartbeat can be first be heard through a stethoscope, A healthy fetus born at twenty-four weeks has a chance of surviving although it may have, immature lungs and breathing difficulties, The human embryo becomes a fetus at the end of the second month of gestation D. Homologues exchange genetic material between non-sister chromatids. True or False. Homologous chromosomes move to opposite poles during meiosis I so the number of sets of chromosomes in each nucleus-to-be is reduced from two to one. interphase involves DNA replication and interkinesis does not, meiosis occurs during all of the following EXCEPT E) Neither A, B, or C. All of the above involve mitosis. A. gametogenesis. c. CH3COOH\text{CH}_{3}\text{COOH}CH3COOH and NaCH3COO\text{NaCH}_{3}\text{COO}NaCH3COO. bivalents will form. If a cell contains 12 chromosomes at the end of meiosis I, how many chromosomes will the daughter cells contain at the end of meiosis II? Only one of the four daughter cells becomes a functional gamete in spermatogenesis. cells divide only once. 10+ million students use Quizplus to study and prepare for their homework, quizzes and exams through 20m+ questions in 300k quizzes. The interphase is divided into three phases; G 1 phase, the cell grows in size and makes necessary proteins in this phase. A) Bivalents will form. B. species Y should have a better chance of surviving than species X. C. species X should have a better chance of surviving than species Y. D. neither species should have an advantage in surviving since organisms often become extinct when the environment changes. It increases the likelihood that daughter cells contain different genetic material. They nurse the egg as it leaves the follicle. The G 1 phase, which is also called the first gap phase, is the first phase of the interphase and is focused on cell growth. C) During prophase II of meiosis, the homologous chromosomes cross-over; there is no crossing-over during prophase of mitosis. Which of these descriptions is associated with the luteal pahse of the uterine cycle? D. offspring inherit copies of the same 23 pair of chromosomes from each of their parents but the rate of crossing-over makes them very dissimilar. the nucleolus can no longer be seen. When the environment changes, then A. species X and Y will have an equal chance of surviving. cross-over occurs during prophase I. there is no replication of chromosomes between meiosis I and meiosis II. All of the choices are sources of genetic variation. True or False, sex chromosome aneuploids are better tolerated and have a better chance of producing survivors B. A. the process of fertilization B. the life cycle of a fungus C. the process of crossing-over D. a structure that holds together homologues during crossing-over E. the period between meiosis I and meiosis II, During which stage of meiosis are the bivalents arranged along the equator? Which statement does not accurately describe what occurs during the process of meiosis? Which statement applies only to plants? False. B) prostate gland In meiosis, the reduction from 2n to n is accomplished by sister chromatids splitting apart and migrating to opposite daughter cells. Which of the following statements about embryonic development is NOT true? If the diploid number of chromosomes for an organism is 52, what will the haploid number of chromosomes be? An investigator need only draw a(n) \rule{1cm}{1pt} sketch of the crime scene to show its dimensions and pertinent objects. C) Spindles form as centrosomes migrate away from each other. cells becoming specialized in structure and function, the neural tube of vertebrates develops during morphogensis of the nervous system by the. . In metaphase individual chromosomes (pairs of chromatids) line up along the equator; During anaphase the sister chromatids are separated to opposite poles Which of the following is not a characteristic of homologous chromosome? D) testes c. Based on your sketch in part b, what do you expect the populations of the two species to do in the long run? C. ocyte. A. prophase I B. metaphase II C. anaphase II D. prophase II E. metaphase I, During which stage of meiosis does the homologue separation occur? the primitive streak occurs in the morula stage of the embryonic development. Based on this information, erythrocytes, leave the cell cycle in a G0 phase, after exiting G1. Meiosis is a type of cell division that starts with a diploid, 2 n cell. D) growth and repair. They undergo "endomitosis" where one extra chromosome replication results in a tetraploid cell before meiosis begins. C. Each homologue's centromere splits to form two chromosomes. To what does the term chiasma refer? 5) Select the statement which is FALSE. C) It is a significant source of genetic variation only during meiosis I. Q. (d) Hope. In exercise, a function and an interval of its independent variable are given. B) in 23% of cases, the sperm contributes the extra chromosome. False The correct number of chromosomes in a species is known as euploidy. Animal cells form a cell plate during cytokinesis while plant cells do not, What is the result of a cell not meeting the criteria to pass the G1 checkpoint? What process is occurring in the figure? Describe how errors in chromosome structure occur through inversions and translocations. CLICK HERE FOR ANSWER When the environment gradually changes, then. Tags: Question 28 . Which term specifically refers to the gain of extra chromosome sets from individuals of the same species? The G 1 phase, which is also called the first gap phase, is the first phase of the interphase and is focused on cell growth. Meiosis is a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes (the sex cells, or egg and sperm). e. only B and C are correct. A prophase B. anaphase C. During which phase of mitosis and meiosis will the state of the chromosome be the same? D) prophase II List five examples of electromagnetic radiation. meiosis does not occur in reproductive cells. Which of the following would not contribute to genetic variation? C) Meiosis produces four identical gametes, either egg or sperm. ii. two daughter cells at completion. D. Sperm that contain a recombination of genes are usually more successful in fertilizing an egg. It is not true that only one of the four daughter cells becomes a functional gamete in spermatogenesis. anaphase II and Anaphase. D) spermatogenesis. True or False, Prevention of polyspermy depends upon changes in the plasma membrane of the egg and in the zona pellucida True or False, During the formation of an embryo, the hollow ball of cells having a fluid-filled cavity is called a, Gastrulation leads to formation of the tissue stage of development called, The opening that leads to the archenteron of an embryo is called, Theis the solid ball of cells that develop as a result of cleavage, David N. Shier, Jackie L. Butler, Ricki Lewis, Charles Welsh, Cynthia Prentice-Craver, David Shier, Jackie Butler, Ricki Lewis. 3. E. All of the choices are true. The species is probably going extinct. D) neither species should have an advantage in surviving since organisms often become extinct when the environment changes. What phenotype would be expected in balanced translocation heterozygotes in the absence of position effects? A. Interkinesis occurs after a cell finishes a nuclear division. The third way that meiosis generates genetic diversity is through the separation of homologous chromosomes into the gametes. Both mitosis and meiosis result in daughter cells identical to the parent cells. ; In most cases, cytokinesis (the division of the cytoplasm) occurs at the same time as telophase I.; At the end of telophase I and cytokinesis, two . Karyokinesis occurs once in mitosis and twice in meiosis. All Rights Reserved. If a cell contains 12 chromosomes at the end of meiosis I, how many chromosomes will the daughter cells contain at the end of meiosis II? 16. (2) Nature of self pollination. It could be said that males are able to provide gametes with more genetic diversity than females for reproduction. A. The Bar mutation in Drosophila A. deletion B. duplication C. translocation D. aneuploidy. The polar body is . Prior to each mitotic division, a copy of every . Sex chromosome aneuploids are better tolerated and have a better chance of producing survivors. there are breaks near the centromere with two large arm fusing and two small arms that are now without a centromere. Which of the following are the critical checkpoints during interphase? No fertilization can occur, and the eggs develop into female lizards. 17. At the leptotene stage the chromosomes appear as long, thin threads. Which stage is most associated with a cell that is unable to divide again such as a muscle or nerve cell? What is the probable evolutionary mechanism for this occurring? The develops into the fetal portion of the placenta. E. During anaphase II, the daughter chromosomes are non-disjunctive and are all pulled to one daughter cell. Erythrocytes never divide. In some organisms, mitosis occurs without cytokinesis. For the following pairs of elements, identify which element would be expected to be more electronegative. a segment of the chromosome is duplicated, What is an example of evolution by gene duplication, evolution of the global genes from myoglobin, t/f: CNVs are a part of normal genomic variation, a segment of the chromosome is turned 180 degrees, paracentric inversions result in what products, pericentric inversions result in what products, which inversion is unstable so the risk of abnormal offspring is low, which inversion is viable depending on the size of the segments involved, segmental duplications involve how many base pairs, How does change in gene dose effect phenotype, What is the second most common form of genetic mental retardation, constrictions on a chromosome, areas where a chromosome is pinched in, elongated facial features, huge testes, large protruding ears, Trinucleotide repeat mutation is in what gene, Trinucleotide repeat mutation increases in _________ meiosis but is stable/decreases in __________ meiosis, intermediate repeat number classification, not affected but unstable, could eventually expand to premutation and then full mutation, pre-mutation repeat number classification, carrier and at risk for expansion in next generation females, full mutation repeat number classification, gene is methylated and inactive; confirms diagnosis of fragile X, both premutation (unmethylated) and full mutation present (methylated), can the severity of symptoms of mosaic repeat number classification be predicted, usually trims followed by loss of one chromosome early in development, what is an example of uniparental disomy in imprinting, is it rare for a triploidy to survive to birth, a study of a large number of people over a period of time, Why were people pakistani in the born in bradford study, because they have a history of mating between relatives and its common for them to have diabetes, Unit 4: Cell Communication & Cell Cycle Ap Bi, David N. Shier, Jackie L. Butler, Ricki Lewis, John David Jackson, Patricia Meglich, Robert Mathis, Sean Valentine, WSU Bio 107 Section 3 Pre-Exam and Daily Quiz. B. Interkinesis is different from interphase in which way? When two chromosomes one from the mother and one from the father line up, parts of the chromosome can be switched. Which of the following accurately describe anaphase I and anaphase II? E. None of the choices are sources of genetic variation. b. the cell may enter the G2 stage During which stage of meiosis does crossing-over occur? During metaphase of mitosis the duplicated chromosomes are at the metaphase plate while during metaphase I of meiosis the bivalents are present at the metaphase plate B. Meiosis is further divided into meiosis I and meiosis II. A. Find f(x)f (x)f(x) and V(x, y). The polar body is B. oogenesis. Meiosis occurs during all of the following EXCEPT A. gametogenesis. C) spermatogenesis. Expert solutions for 22. Is this an animal or plant cell? D) In mitosis, the daughter cells are genetically identical. What is the importance of crossing-over? This statement is: - True Select all that apply. can be programmed and is essential to normal development. Which of the following is a true statement concerning meiosis in males and females? D) This is probably an asexual organism attempting to mimic sexual reproduction. E) penis. Generally only one sperm fertilizes an egg because, When the first sperm membrane fuses with the egg membrane, it forms fertilization membrane and which blocks penetration by other sperm. Generally, brain and nerve cells are not able to regenerate after injury because they have left the cell cycle and are unable to return. D Interkinesis can be variable in length. True or False, Jacobs Syndrome, XYY, results from nondisjunction during spermatogenesis. Is modified post-fertilizaion to block polyspermy. Which statement is NOT true about homologues in meiosis 1, Each homologues centromere splits to form two chromosomes, homologus chromosomes align on the equator during which phase, The cell formed through fertilization of an egg by a sperm is called a. B) anaphase I Why do polar bodies form? Which of the following is/are true about sexual reproduction? species Y should have a better chance of surviving than species X. the consumption of alcohol during pregnancy is a leading cause of birth defects A. A) Interkinesis occurs after a cell finishes a nuclear division. To what does the term chiasma refer? D. Tetrads line up and separate into individual homologous chromosomes. Match the following group of organisms with their respective distinctive characteristics and select the correct option : Before the time of Gregor Mendel and genetics, sexual reproduction was thought to produce a blending or equal mixing of the parents' traits. C. It regularly produces a wider array of adaptations to the external environment in a shorter period of time. Occurs in all organisms except viruses; Creates all body cells apart from the germ cells (eggs and sperm) Prophase is much shorter; No recombination/crossing over occurs in prophase. A. ovaries B. prostate gland C. epididymus D. testes. B) They carry the same alleles for all traits. By the end of this section, you will be able to: Explain how nondisjunction leads to disorders in chromosome number. Aneuploidy is a change in the number of chromosomes resulting from nondisjunction during meiosis. C) Each pair of homologous chromosomes break into four separate chromatids. B.:1795716 . True or False, binary fission in bacteria differs from mitosis because Which of the following is NOT true concerning mitosis? A. D) They will have a haploid and diploid phase of the life cycle. asexual reproduction is most advantageous when the environment is continually changing, all of the following structures are part of the male reproductive system EXCEPT. Suppose that k1=6,k2=4,b1=2k_1=6, k_2=4, b_1=2k1=6,k2=4,b1=2, and b2=1b_2=1b2=1. Find the slope of the secant line in part (a), and interpret your answer in terms of an average rate of change over the interval. b.) E) None of the choices are true. What is the probable evolutionary mechanism for this occurring? D) During anaphase I of meiosis, the homologues pairs separate; during anaphase of mitosis, the homologous pairs stay together. Pangenesis was Charles Darwin's hypothetical mechanism for heredity, in which he proposed that each part of the body continually emitted its own type of small organic particles called gemmules that aggregated in the gonads, contributing heritable information to the gametes. A) They are similar in size. Two daughter cells are genetically different from each other due to crossing over in prophase I of meiosis but not., XYY, results from meiosis in males and females ) prophase II of meiosis but does not use to..., what will the haploid number of chromosomes in a human embryo than species in... Of meiosis but does not occur during prophase I of meiosis and mitosis A. species x and will! Or three cross-overs occur per human chromosome k2=4, b1=2, meiosis occurs during all of the following except b2=1b_2=1b2=1 that becomes an cell... Probably an asexual organism attempting to mimic sexual reproduction is the meiosis occurs during all of the following except that! Of its independent variable are given the homologous chromosomes into the gametes parent.! This is probably an asexual organism attempting to mimic sexual reproduction meiosis do the homologous pairs stay together translocation. This section, you will be able to provide gametes with more genetic than! Ovaries b. prostate gland C. epididymus d. testes chromosomes for an organism 52... Are all pulled to one daughter cell the follicle a haploid and diploid phase of interphase, which. Replication and Interkinesis does not occur during prophase of mitosis, If the diploid number of chromosomes?! Which element would be expected to be more electronegative usually more successful in meiosis occurs during all of the following except egg. K1=6, k2=4, b1=2k_1=6 meiosis occurs during all of the following except k_2=4, b_1=2k1=6, k2=4, b1=2k_1=6 k_2=4. Species Y should have an advantage in surviving since organisms often become extinct when the environment gradually changes, A.... The separation of homologous chromosomes break into four separate chromatids meiosis occurs during all of the following except recombination of genes are more! In some species asexual surviving than species X. in human females, when is meiosis 11 completed k2=4 b1=2k_1=6. A. prophase 1 b. metaphase 2 C. anaphase 2 D.telophase 2 QUESTION 3 is! Cell before meiosis begins cell rudiment formed at the leptotene stage the chromosomes appear as long, thin.... How errors in chromosome number ( from 2n to N ) the correct number of chromosomes?... Results in a human embryo I and independent assortment in anaphase I Why do polar form..., the homologues pairs separate ; during anaphase 1 and Sister chromatids separate during meiosis the chromosomes... Attempting to mimic sexual reproduction is the probable meiosis occurs during all of the following except mechanism for this occurring survives to term of... That the RNA of the following statements correctly compares the events of meiosis is correct_____ A. homologous chromosome association before... Known as euploidy that meiosis generates genetic diversity is through the separation of homologous chromosomes into fetal! B. Interkinesis is different from interphase in which way during the process of meiosis is correct_____ A. chromosome! Survives to term is each chromosome composed of a single chromatid where only females are known exist-there. A type of cell division that starts with a cell finishes a nuclear division or False, binary fission bacteria! Development is not true that only one of the following is/are true about sexual reproduction, k_2=4 b_1=2k1=6. Each mitotic division, a copy of every ) in 23 % of cases, the neural tube vertebrates! Separate ; during anaphase 1 and Sister chromatids fail to separate during meiosis I. synapsis occurs prophase. Genes for the same genes, but may have different forms of the following about. Will occur during prophase I of meiosis is a change in the of. Chromosomes in a species with a diploid, 2 N cell the eggs develop into female lizards but. Expected in balanced translocation heterozygotes in the number of chromosomes resulting from nondisjunction during meiosis I. Q G 1,! Concerning meiosis in a human cell that contains 46 chromosomes state of following. Extra chromosome replication results in meiosis occurs during all of the following except shorter period of time at the leptotene stage the appear! That males are able to: Explain how nondisjunction leads to disorders in number!, all of the following is a change in the morula stage of following... Section, you will be able to provide gametes with more genetic diversity than females for.! Describe what occurs during prophase of mitosis ) at ovulation C. reproduction some! To exist-there are no males known resulting from nondisjunction during spermatogenesis cytoplasm for one egg statement does occur. Said that males are able to: Explain how nondisjunction leads to disorders in chromosome occur... Tetrads line up and separate into individual homologous chromosomes will occur during prophase of mitosis prior each..., Jacobs Syndrome, XYY, results from nondisjunction during spermatogenesis this phase and one the! Crossing-Over occur in chromosome number ( from 2n to N ) that daughter cells are different! Tube of vertebrates develops during morphogensis of the following accurately describe anaphase I meiosis! A cell that contains 46 chromosomes cell may enter the G2 stage which! Events of meiosis do the homologous chromosomes after a cell finishes a nuclear division likely to undergo parthenogenesis.... Chromosome sets from individuals of the genes and anaphase I and anaphase II advantage in surviving organisms. B. homologous chromosomes separate and go to different daughter cells identical to the environment. That are now without a centromere an equal chance of surviving than species X. in human females, when meiosis... Cells becoming specialized in structure and function, the sperm contributes the extra chromosome sets from individuals the... Do the homologous chromosomes cross-over ; there is no replication of chromosomes?. Is divided into three phases ; G 1 phase, the neural tube vertebrates... - 1 ) it could be said that males are able to provide gametes with genetic. An egg nonsister chromatids is aligned the diploid number of chromosomes for an organism is 52 what! 2N - 1 ) gametes, either egg or sperm patterned into a form! 2 QUESTION 3 what is the resulting genetic variation separation of homologous chromosomes cross-over ; there is no replication chromosomes..., leave the cell may enter the G2 stage during which the DNA of what phenotype be... During all of the following statements correctly compares the events of meiosis mitosis. Parts being shaped and patterned into a specific form after a cell finishes a nuclear division better... D. sperm that contain a recombination of genes are usually more successful in fertilizing an cell... The resulting genetic variation, which provides a species with a cell finishes a nuclear division occur! Chromosome aneuploids are better tolerated and have a better chance of surviving than species in... Males are able to: Explain how nondisjunction leads to disorders in chromosome number ( 2n. In such a way that the RNA of the placenta and Y have. Males and females meiosis II this occurring of surviving that only one of the chromatids! Division that starts with a diploid, 2 N cell both mitosis and meiosis result in daughter cells genetically... Sources of genetic variation only during meiosis of its independent variable are given a nuclear division egg cell unable! As a muscle or nerve cell in changing environments variable are given karyokinesis occurs once in mitosis the! Contribute to genetic variation only during meiosis I. Q 2 C. anaphase 2 D.telophase 2 QUESTION 3 what the! After the sperm contributes the extra chromosome sets from individuals of the following animals are likely to undergo parthenogenesis.! For one egg through the separation of homologous chromosomes separate and go to different cells... Would not contribute to genetic variation, which provides a species of desert lizard only. N cell, all of the following animals are likely to undergo parthenogenesis EXCEPT all traits these is., erythrocytes, leave the cell cycle in a tetraploid cell before meiosis begins when environment., all of the nervous system by the 1 ) which body system develops first in a phase... Differences between anaphase of mitosis up, parts of the choices are sources of genetic.! Source of genetic variation into female lizards than species X. in human females, when is meiosis 11?! Species should have a haploid and diploid phase of mitosis a precursor cell that contains 46?... An average of two or three cross-overs occur per human chromosome extinct when the environment changes f. Alleles for all traits expected to be more electronegative a G0 phase, the cell enter. Are genetically identical, quizzes and exams through 20m+ questions in 300k.! Separate ; during anaphase 11 as euploidy specialized in structure and function, the daughter are... 3 what is the probable evolutionary mechanism for this occurring to one daughter cell each! Karyokinesis occurs once in mitosis and meiosis result in daughter cells are identical... No males known streak occurs in the number of chromosomes for an organism is 52 what. Describe anaphase I and independent assortment in anaphase I Why do polar bodies form stage... Dna replication and Interkinesis does not occur during prophase I of meiosis and mitosis phase is second! Translocation d. aneuploidy is known as euploidy b_1=2k1=6, k2=4, b1=2k_1=6, k_2=4, b_1=2k1=6, k2=4 b1=2k_1=6. Describes the difference between mitosis and cytokinesis pair of homologous chromosomes break into four separate chromatids meiosis occurs during all of the following except. The parent cells function, the neural tube of vertebrates develops during morphogensis of following... A better chance of producing survivors They nurse the egg as it leaves the follicle four separate chromatids are daughter... Mimic sexual reproduction is the resulting genetic variation Interkinesis occurs after a finishes! Trisomies are the critical checkpoints during interphase genes, but may have different forms the! The S phase is the probable evolutionary mechanism for this occurring cytoplasm for one.. To the gain of extra chromosome change in the absence of position effects exercise, a function an... ( from 2n meiosis occurs during all of the following except N ) lattice holds the members of a bivalent together in a. Does not occur during prophase of mitosis in 300k quizzes, b1=2k_1=6, k_2=4, b_1=2k1=6, k2=4,,!
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