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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

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Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 12, Problem 9SQ
Textbook Problem
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The cell pictured to the right is in which stage or nuclear division?

  1. a. metaphase II
  2. b. anaphase I
  3. c. anaphase II
  4. d. interphase

Chapter 12, Problem 9SQ, The cell pictured to the right is in which stage or nuclear division? a. metaphase II b. anaphase I

Summary Introduction

Introduction: Meiotic division is a division that occurs in a cell that typically lessens the number of chromosomes present in its parent cell by half. Meiotic divisions are more complex than the mitosis. Here, the cell divides twice the times. The first division of diploid cell gives two diploid daughter cells (Meiosis I) and the next division reduces the chromosome number by half that later on give rise to four haploid cells. Every round of division contains four stages that include:  the initial prophase metaphase, anaphase and the final telophase.

Explanation of Solution

Reason for correct answer: The given picture shows the two cells that simultaneously undergoes anaphase II stage of meiosis. Here, the centromeres are separated and the two sister chromatids of each chromosome moved to the opposite poles. After the sister chromatids separation, the structure can be now known as individual chromosomes.

Option c. is given as “anaphase II”.  Anaphase II is the stage in the meiosis II where both the cells, the centromeres separate and move to opposite poles through spindles.

Hence, the correct answer is option c.

Reason for incorrect answer:

Option a. is given as, “metaphase II”.  The stage shown in the given figure is not metaphase II because in metaphase II, the chromosomes visualize as lined up separately by the side of the metaphase plate...

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