LIFE: THE SCIENCE OF BIOLOGY
LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 9781319145125
Author: Sadava
Publisher: MAC HIGHER
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Chapter 12, Problem 4Q
Summary Introduction

To explain:

The cross-over between chromosomes containing genes DDbb and ddBB during meiosis and representation of chromatids and chromosomes before, during, and after crossing over, with the help of a diagram.

Introduction:

A crossing over occurs between chromosomes during meiosis. The meiosis the part of cell-cycle, during, which the genetic material from both the parents gets exchanged. A synapse is formed at the prophase 1 of the meiosis, which is followed by the cross-over between two chromosomes. During a cross-over a new type of phenotype is formed, representing recombinants that are different from either parent.

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The Cell Cycle and its Regulation; Author: Professor Dave Explains;https://www.youtube.com/watch?v=eqJqhA8HSJ0;License: Standard YouTube License, CC-BY
Cell Division - Mitosis and Meiosis - GCSE Biology (9-1); Author: Mr Exham Biology;https://www.youtube.com/watch?v=w7vp_uRA8kw;License: Standard YouTube License, CC-BY