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Biology: The Unity and Diversity o...

0th Edition
STARR
ISBN: 9780357093795

Solutions

Chapter
Section
FindFindarrow_forward

Biology: The Unity and Diversity o...

0th Edition
STARR
ISBN: 9780357093795

Textbook Problem

Crossing over happens during which phase of meiosis?

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

Summary Introduction

Introduction:

The crossing over involves the exchange of the DNA segments between the homologous chromosomes that will finally end in the formation of recombinant chromosomes as a result of sexual reproduction. Usually crossing over takes place at the pachytene stage of prophase I (meiosis I) that is one of the final phases of genetic recombination. Crossing over helps to produce altered alleles in the homologous chromosome due to the exchange of the DNA between them. Thus, new order of allele possessing gametes can be produced that ultimately leads to genetic diversity of an organism.

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