Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 16.4, Problem 3R
Summary Introduction
To review:
The occurrence and reason for X chromosome inactivation.
Introduction:
The normal mammalian males have an X and a Y chromosome, whereas the normal female has two X chromosomes. Many observations show that only single X chromosome remains active in females. One X chromosome in the female is inactivated during the early stage of embryonic development.
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What is the spreading phase of X-chromosome inactivation? Whydo you think it is called a spreading phase?
Outline the process of X-chromosome inactivation.
what is X-chromosome reactivation.?
Chapter 16 Solutions
Life: The Science of Biology
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- What is the inactivation ofthe X chromosome? What is aBarr body?arrow_forwardWhat are chromosome 9 characteristics and where does chromosome 9 represent?arrow_forwardOccasionally, a mouse X chromosome is broken into two pieces and each piece becomes attached to a different autosome. In this event, the genes on only one of the two pieces undergo X inactivation. What does this observation indicate about the mechanism of X-chromosome inactivation?arrow_forward
- Why is X chromosome inactivation important in female cells? (300 word limit)arrow_forwardHow are the genes on the X chromosome regulated?arrow_forwardwhat is the significance of chromosomal aberration? what are the different types of chromosomal abberations based on the structure and number of chromosomes? give examples for each. what environmental factors may increase in the incidence of chromosomal aberrations?arrow_forward
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