Human Heredity: Principles and Issues (MindTap Course List)
Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 3, Problem 18QP

More Crosses with Pea Plants: The Principle of Independent Assortment

Determine the possible genotypes of the following parents by analyzing the phenotypes of their children. In this case, we will assume that brown eyes (B) is dominant to blue (b) and that right-handedness (R) is dominant to left-handedness (r).

  1. a. Parents: brown eyes, right-handed × brown eyes, right-handed

Offspring: 3/4 brown eyes, right-handed

1/4 blue eyes, right-handed

  1. b. Parents: brown eyes, right-handed × blue eyes, right-handed

    Offspring: 6/16 blue eyes, right-handed

    2/16 blue eyes, left-handed

    6/16 brown eyes, right-handed

2/16 brown eyes, left-handed

  1. c. Parents: brown eyes, right-handed × blue eyes, left-handed

    Offspring: 1/4 brown eyes, right-handed

    1/4 brown eyes, left-handed

    1/4 blue eyes, right-handed

    1/4 blue eyes, left-handed

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Human Heredity: Principles and Issues (MindTap Course List)

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