3. Diploid somatic cells of elephants have 56 chromosomes. What would be the resulting numberof chromosomes in each one of the four sperms formed from a spermatocyte, if nondisjunction ofone chromosome occurs in meiosis I? Briefly justify your answer.

Primary spermatocyte undergoes meiosis to produce spermatids. Meiosis occurs in two stages,…

Answered: 3. Diploid somatic cells of elephants…

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter8: How Cells Reproduce

Section: Chapter Questions

Problem 4CT

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The part of meiosis that is similar to mitosis is ___________ . meiosis I anaphase I meiosis II interkinesis
Explain how the random alignment of homologous chromosomes during metaphase I contributes to the variation in gametes produced by meiosis.
Chiasmata: a. form during metaphase II of meiosis. b. occur between two nonhomologous chromosomes. c. represent chromosomes independently assorting. d. are sites of DNA exchange between homologous chromatids. e. ensure the resulting cells are identical to the parent cell.
1. How does meiosis I differ from mitosis? What about meiosis II from mitosis? difference between meiosis l and mitosis? difference between meiosis ll and mitosis? 2. What is the relationship between meiosis and fertilization? 3. If cell division during gametogenesis is non-meiotic, what is its consequence to the future generations of diploid organisms? 4. How does non-disjunction in meiosis lead to numerical chromosomal aberration?
1. List three ways in which mitosis differs from meiosis. Be specificMITOSIS MEIOSIS1. 2. 3. 2. What would happen to the chromosome number in gametes and offspring if gametes were formed by the mitotic process instead of the meiotic process?
a. What phase of meiosis is this cell undergoing? b. Identify the 3 things that are incorrect in terms of this cells structure and organization? c. Would this cell produce viable gametes? Why or why not.
1. How would a tubal ligation or vasectomy influence meiosis in individuals who elected to have one of these operations? 2. Synapsis of homologous chromosomes is perhaps the most important event in meiosis. What is it and what does it do?
3. A nondisjunction occurs in the sex chromosomes of a male mouse. What ratio of sex chromosome genotypes would you expect among the gametes in the two following scenarios. Make sure to includethe gamete’s sex chromosome genotype in your genotypic ratio. (A) The nondisjunction of the sex chromosomes occurs only in Meiosis I? (B) The nondisjunction of the sex chromosomes occurs only in Meiosis II?
7 10 6. Tight pairing of the homologous chromosomes. O Meiosis II O Meiosis I O Mitosis 7. Separation of the two cells into four genetically unique haploid cells. Mitosis O Meiosis I O Meiosis II
1.What happens during anaphase in mitosis, meiosis I, and meiosis II? What happens if the steps you just described do not occur correctly during meiosis? State the term for this sort of meiotic error and the term that describes the resulting daughter cells.
2.) What are the three function of Meiosis cell division? What is the end result of meiosis cell division?
5. T.) a. Choose the figure (A or B) where nondisjunction occurs in Meiosis I. b. Explain specifically why you chose this figure. (XX) (X) (X) DOO X Meiosis I Meiosis II (4 pts) Pangolins have 19 pairs of chromosomes. hat is the O B (XX) (XX) Meiosis I 28 201 OOOO Meiosis II

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3. Diploid somatic cells of elephants have 56 chromosomes. What would be the resulting number of chromosomes in each one of the four sperms formed from a spermatocyte, if nondisjunction of one chromosome occurs in meiosis I? Briefly justify your answer.