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Variations on a Theme by Mendel Pea plants usually have white or red flowers. A strange pea-plant variant is found that has pink flowers. A selfcross of this plant yields the following phenotypes: 30 red flowers 62 pink flowers 33 white flowers What are the genotypes of the parents? What is the genotype of the progeny with red flowers?

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Human Heredity: Principles and Iss...

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

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Section
BuyFindarrow_forward

Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052
Chapter 3, Problem 30QP
Textbook Problem
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Variations on a Theme by Mendel

Pea plants usually have white or red flowers. A strange pea-plant variant is found that has pink flowers. A selfcross of this plant yields the following phenotypes:

30 red flowers

62 pink flowers

33 white flowers

What are the genotypes of the parents? What is the genotype of the progeny with red flowers?

Summary Introduction

To predict: The genotype of the parent plants with red and white flowers producing 30 red, 62 pink and 33 white flowers.

Introduction: Gregor Mendel was an Austrian monk, who worked on a pea plant to observe the pattern of inheritance of certain characters from the parent plant to the offspring. 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 color and recessive for white flower color. The cross made between the true-breeding red flower (RR) and true-breeding white flower (rr) will produce exclusively pink flowers with genotype “Rr”. When this plant is self-crossed the progeny produced is as follows:

GametesRr
R

RR

(red flower)

Rr

(pink flower)

Summary Introduction

To determine: The genotype of the red flowers in progeny

Introduction: Gregor Mendel was an Austrian monk, who worked on a pea plant to observe the pattern of inheritance of certain characters from the parent plant to the offspring. 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.

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Chapter 3 Solutions

Human Heredity: Principles and Issues (MindTap Course List)
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Ch. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - Meiosis Explains Mendels Results: Genes Are on...Ch. 3 - Meiosis Explains Mendels Results: Genes Are on...Ch. 3 - Meiosis Explains Mendels Results: Genes Are on...Ch. 3 - Meiosis Explains Mendels Results: Genes Are on...Ch. 3 - Meiosis Explains Mendels Results: Genes Are on...Ch. 3 - Variations on a Theme by Mendel A characteristic...Ch. 3 - Meiosis Explains Mendels Results: Genes Are on...Ch. 3 - Variations on a Theme by Mendel Pea plants usually...Ch. 3 - Variations on a Theme by Mendel A plant geneticist...Ch. 3 - Variations on a Theme by Mendel What are the...Ch. 3 - Meiosis Explains Mendels Results: Genes Are on...Ch. 3 - Variations on a Theme by Mendel What is the chance...Ch. 3 - Variations on a Theme by Mendel A hypothetical...Ch. 3 - Variations on a Theme by Mendel In homozygotes,...

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