Why is aneuploidy of the sex chromosomes less debilitating than aneuploidy of even the smallest autosomes? (Note: multiple responses are correct, please choose the best answer(s)) Select one or more: Only one X chromosome is required at any given time. Additional X chromosomes (as in females) are inactivated in most cells except for gametes Dosage compensation requires that all excess chromosomes (i.e. 2 or more) are activated at all times during the cell cycle The Y chromosome carries a number of critical genes involved in spermatogenesis and sex development. Therefore, having two copies of the Y chromosome results in the overproduction of sperm and increased fertility The Y chromosome carries a number of critical genes required for spermatogenesis and sex development, but very few other genes. Therefore, having two copies of the Y chromosome has minimal impact on the balance of gene expression
Why is aneuploidy of the sex chromosomes less debilitating than aneuploidy of even the smallest autosomes? (Note: multiple responses are correct, please choose the best answer(s)) Select one or more: Only one X chromosome is required at any given time. Additional X chromosomes (as in females) are inactivated in most cells except for gametes Dosage compensation requires that all excess chromosomes (i.e. 2 or more) are activated at all times during the cell cycle The Y chromosome carries a number of critical genes involved in spermatogenesis and sex development. Therefore, having two copies of the Y chromosome results in the overproduction of sperm and increased fertility The Y chromosome carries a number of critical genes required for spermatogenesis and sex development, but very few other genes. Therefore, having two copies of the Y chromosome has minimal impact on the balance of gene expression
Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Lauralee Sherwood
Chapter20: The Reproductive System
Section: Chapter Questions
Problem 11RE
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Why is aneuploidy of the sex chromosomes less debilitating than aneuploidy of even the smallest autosomes?
(Note: multiple responses are correct, please choose the best answer(s))
Select one or more:
- Only one X chromosome is required at any given time. Additional X chromosomes (as in females) are inactivated in most cells except for gametes
- Dosage compensation requires that all excess chromosomes (i.e. 2 or more) are activated at all times during the cell cycle
- The Y chromosome carries a number of critical genes involved in spermatogenesis and sex development. Therefore, having two copies of the Y chromosome results in the overproduction of sperm and increased fertility
- The Y chromosome carries a number of critical genes required for spermatogenesis and sex development, but very few other genes. Therefore, having two copies of the Y chromosome has minimal impact on the balance of gene expression
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