Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1259188132
ISBN 13: 978-1-25918-813-8

Chapter 13 - Chromosomes, Mapping, and the Meiosis-Inheritance Connection - Review Questions - Understand - Page 255: 4

Answer

A.

Work Step by Step

Mapping looks at how connected two genes are on a chromosome in terms of the frequency of crossing over between them (A.). B.-D. all refer to other genetic phenomena which help us understand the map, such as the length of a chromosome, but not to the map distance itself which comes directly from measuring recombination.
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