Genetics: A Conceptual Approach
Genetics: A Conceptual Approach
6th Edition
ISBN: 9781319050962
Author: Benjamin A. Pierce
Publisher: W. H. Freeman
Question
100%
Book Icon
Chapter 2.3, Problem 17COQ
Summary Introduction

To explain:

The reason that sister chromatids remain together in anaphase I but separate in anaphase II of meiosis.

Introduction:

Meiosis results into the formation of four daughter cells and each of the daughter cell have half number of chromosomes than the parent cell. There are two meiosis processes namely meiosis I and meiosis II.

Expert Solution & Answer
Check Mark

Explanation of Solution

In meiosis I, anaphase I stage includes two homologous chromosomes having centromere which is the center point of the two chromosomes. The chromosomes remain intact with the help of cohesion between them and are protected by a protein known as shugoshin. This protein acts as a protective agent.

At the end of metaphase II, the centromere protection breaks down. This breaking down of shugoshin protection on the centromere allows the sister chromatids to separate in anaphase II.

Conclusion

The shugoshin, a protective protein does not allow the chromatids to separate in anaphase I but in anaphase II, the degradation of protective protein allows the two chromatids to separate.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Knowledge Booster
Background pattern image
Recommended textbooks for you
Text book image
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Text book image
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Text book image
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Text book image
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Text book image
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Text book image
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education