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As it turned out, one of the tallest Potsdam Guards had an unquenchable attraction to short women. During his tenure as guard, he had numerous clandestine affairs. In each case, children resulted. Subsequently, some of the children—who had no way of knowing that they were related—married and had children of their own. Assume that two pairs of genes determine height. The genotype of the 7-foot-tall Potsdam Guard was A 9 A 9 B 9 B 9, and the genotype of all of his 5-foot clandestine lovers was AABB . An A 9 or B 9 allele in the offspring each adds 6 inches to the base height of 5 feet conferred by the AABB genotype. a. What were the genotypes and phenotypes of all the F1 children? b. Diagram the cross between the F1 offspring, and give all possible genotypes and phenotypes of the F2 progeny

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Human Heredity: Principles and Iss...

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

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Chapter
Section
BuyFindarrow_forward

Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052
Chapter 5, Problem 5QP
Textbook Problem
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As it turned out, one of the tallest Potsdam Guards had an unquenchable attraction to short women. During his tenure as guard, he had numerous clandestine affairs. In each case, children resulted. Subsequently, some of the children—who had no way of knowing that they were related—married and had children of their own. Assume that two pairs of genes determine height. The genotype of the 7-foot-tall Potsdam Guard was A9A9B9B9, and the genotype of all of his 5-foot clandestine lovers was AABB. An A9 or B9 allele in the offspring each adds 6 inches to the base height of 5 feet conferred by the AABB genotype.

  1. a. What were the genotypes and phenotypes of all the F1 children?
  2. b. Diagram the cross between the F1 offspring, and give all possible genotypes and phenotypes of the F2 progeny

a.

Summary Introduction

To determine: The genotype and phenotype of all the F1 children.

Introduction: The 7-foot tall Potsdam Guards with genotype A´A´B´B´ had many affairs with 5-foot tall women having a genotype of AABB. The presence of A or B allele adds 6 inches to the base height of 5 feet conferred by AABB genotype. Their children got married and had children of their own.

Explanation of Solution

The 7-foot tall Potsdam Guard had the genotype of A´A´B´B´. It means that his gametes would have alleles A´B´. His 5-foot tall lovers had the genotype AABB. The gametes formed will be AB. The genotype of the F1 generation will be A´AB´B.

The presence of A´ or B´ allele adds 6 inches to the base height of 5 foot. The genotype of the F1 offspring had one A´ allele and one B´ allele. So, the phenotype will be:

Height=5feet+6inch+6inch

b.

Summary Introduction

To determine: The cross between the F1 offspring and give all the possible genotypes and phenotypes of the F2 progeny.

Introduction: The 7-foot tall Potsdam Guards with genotype A´A´B´B´ had many affairs with 5-foot tall women having a genotype of AABB. The presence of A or B allele adds 6 inches to the base height of 5 feet conferred by AABB genotype. Their children got married and had children of their own. The F1 children had the genotype of A´AB´B with 6 feet in height.

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