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Variations on a Theme by Mendel A characteristic of snapdragons amenable to genetic analysis is flower color. Imagine that a true-breeding red- flowered variety is crossed to a pure line having white flowers. The progeny are exclusively pink-flowered. Diagram this cross, including genotypes for all P1 and F1 phenotypes. What is the mode of inheritance? Let F = red and f = white.

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Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052

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BuyFindarrow_forward

Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052
Chapter 3, Problem 28QP
Textbook Problem
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Variations on a Theme by Mendel

A characteristic of snapdragons amenable to genetic analysis is flower color. Imagine that a true-breeding red- flowered variety is crossed to a pure line having white flowers. The progeny are exclusively pink-flowered. Diagram this cross, including genotypes for all P1 and F1 phenotypes. What is the mode of inheritance? Let F = red and f = white.

Summary Introduction

To predict: The cross for the parent plants with red and white flowers along with the mode of inheritance.

Introduction: Gregor Mendel was an Austrian monk, who worked on a pea plant to observe the pattern of the inheritance of certain characters from the parent plant to the offsprings. He termed genes as factors that are passed from one generation to another. He proposed three laws, which came to be known as Mendel’s law of genetics.

Explanation of Solution

The flower color in snapdragon (Antirrhinum majus) is dominant for red flower and recessive for white flower color. The cross made between the true-breeding red flower (FF) and true-breeding white flower (ff) will produce the following offsprings:

GametesFF
f

Ff

(pink flower)

Ff

(pink flower)

f

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Chapter 3 Solutions

Human Heredity: Principles and Issues (MindTap Course List)
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