Chapter 10, Problem 8STP

Summary Introduction

Introduction:

In animals the sexual life cycle involves meiosis. Meiosis involves two consecutive cell divisions called meiosis I and meiosis II. In meiosis I and II, the stages are prophase I and II, metaphase Iand II, anaphase Iand II and telophase Iand II.

Answer to Problem 8STP

Correct answer :

The correct answer is option B. anaphase II

Explanation of Solution

Explanation/justification for the correct answer:

OptionB. anaphase II- This is the third stage in meiosis II. In this phase the centromeres split and sister chromatids separate and move to opposite poles. Hence, this is the correct option.

Explanation for incorrect answer:

Option A. anaphase I- During this process the homologous chromosomes separate and move to opposite poles of the cell. Hence, this is not the correct option.

Option C. telophase I- In this phase the spindles break down and the chromosomes uncoil and form two nuclei. The cell divides to form two daughter cells.Hence, this is not the correct option.

Option D. telophase II- In this phase the spindle breaks down and four nuclei forms around chromosomes. Cells divide and form four daughter cells. Hence, this is not the correct option.