Campbell Biology with MasteringBiology Canvas Direct Integration for BSC 2011 University of South Florida, 1/e
1st Edition
ISBN: 9781323442982
Author: Reece
Publisher: Pearson Education
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Chapter 46.3, Problem 2CC
Summary Introduction
To explain: The reason that the process of oogenesis to haploid egg production by meiosis in animals, including human is not entirely accurate.
Concept introduction: Meiosis is a type of cell division that occurs in reproductive cells. This results in formation of four daughter cells. This process is called reductional division because it generates haploid cells that have half the chromosome number to parent cell.
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In humans, gametogenesis in both sexes relies on meiosis. However, spermatogenesis produces four gametes while oogenesis produces only one. Explain why this is so, including the specific structures or processes involved.
Male honeybees, which are haploid, produce sperm by meiosis.Explain what unusual event (compared with other animals) mustoccur during spermatogenesis in honeybees to produce sperm.Does this unusual event occur during meiosis I or meiosis II?
In the process of Oogenesis in animal cells, will the genotype of the second polar body (derived from meiosis II) always be identical to that of the ootid? Why or why not?
Chapter 46 Solutions
Campbell Biology with MasteringBiology Canvas Direct Integration for BSC 2011 University of South Florida, 1/e
Ch. 46.1 - Compare and contrast the outcomes of asexual and...Ch. 46.1 - Parthenogenesis is the most common form of asexual...Ch. 46.1 - WHAT IF? If a hermaphrodite self-fertilizes, will...Ch. 46.1 - Prob. 4CCCh. 46.2 - How does internal fertilization facilitate life on...Ch. 46.2 - What mechanisms have evolved in animals with (a)...Ch. 46.2 - MAKE CONNECTIONS What are the shared and distinct...Ch. 46.3 - Why might frequent use of a hot tub make it harder...Ch. 46.3 - Prob. 2CCCh. 46.3 - WHAT IF? If each vas deferens in a male was...
Ch. 46.4 - How are the functions of FSH and LH in females and...Ch. 46.4 - How does an estrous cycle differ from a menstrual...Ch. 46.4 - WHAT IF? If a human female begins taking...Ch. 46.4 - Prob. 4CCCh. 46.5 - Prob. 1CCCh. 46.5 - In what ways are tubal ligation and vasectomy...Ch. 46.5 - Prob. 3CCCh. 46 - Would a pair of haploid offspring produced by...Ch. 46 - Identify which of the following, if any, are...Ch. 46 - How does the difference in size and cellular...Ch. 46 - Prob. 46.4CRCh. 46 - Prob. 46.5CRCh. 46 - Prob. 1TYUCh. 46 - In male mammals, excretory and reproductive...Ch. 46 - Prob. 3TYUCh. 46 - Prob. 4TYUCh. 46 - Prob. 5TYUCh. 46 - Prob. 6TYUCh. 46 - Prob. 7TYUCh. 46 - Prob. 8TYUCh. 46 - DRAW IT In human spermatogenesis, mitosis of a...Ch. 46 - Prob. 10TYUCh. 46 - SCIENTIFIC INQUIRY You discover a new egg-laying...Ch. 46 - WRITE ABOUT A THEME: ENERGY AND MATTER In a short...Ch. 46 - SYNTHESIZE YOUR KNOWLEDGE A female Komodo dragon...
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- What would happen,if meiosis in humans always produced diploid gametes? Explain?arrow_forwardThe process of oogenesis is often described as theproduction of a haploid egg by meiosis, but in someanimals, including humans, this description is notentirely accurate. Explain.arrow_forwardExamine the attached fig, which shows oogenesis in animalcells. Will the genotype of the second polar body (derivedfrom meiosis II) always be identical to that of the ootid?Why or why not?arrow_forward
- In a possible future scenario, male fertility drops to zero, but, luckily, scientists develop a way for women to pro-duce babies by virgin birth. Meiocytes are converted di-rectly (without undergoing meiosis) into zygotes, which implant in the usual way. What would be the short- andlong-term effects in such a society?arrow_forwardExplain the reason why in the absence of Delta, cells become unsynchronized and somites are not formed completely.arrow_forwardDescribe one function, brought about by the process of meiosis thatspermatogenesis and oogenesis have in common. Please write the similarities between spermatogenesis and oogenesis in a paragraph ratherthan a table. Please discuss the process mentioning differentiation, multiplication anddivision. How many stages of meiosis do they go through. Please mention if haploid ordiploid cells are formed.arrow_forward
- Suppose that during mesodermal development, a mutation in metanephric mesenchyme was observed resulting in the deformation of the metanephros. How would that affect the formation of gametes? (Explain constructively)arrow_forwardOogenesis is the process of female gamete (ovum or egg) production in animals. Spermatogenesis is the process of male gamete (sperm) production in animals. Although both processes produce gamete(s), there are distinct similarities and differences between the two.  Compare and contrast oogenesis to spermatogenesis by drawing a diagram showing the two processes. In your hand-drawn diagrams, be sure to include when the processes of mitosis, meiosis I and meiosis II are occurring identify each germ cell structure and its ploidy highlight 4 differences between the two processesarrow_forwardCompare and contrast the oogenesis and spermatogenesis in chicken and drosophila melanogasterarrow_forward
- Briefly explain why there is no interphase in between Meiosis I and Meiosis II.arrow_forwardHow many somites are there in mouse? In chicks? In humansarrow_forwardExplain the Sexual reproduction and to explain why meiosis contributes to one of its great strength.With this explain the reasons why genetic mutation in asexual organism leads to much more rapid evolutionary changes than do genetic mutation in sexual forms.arrow_forward
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