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Single-Gene Mutations Cause Behavioral Disorders The opposite of perfect pitch is tone deafness—the inability to identify musical notes. In one study, a bimodal distribution in populations was found, with frequent segregation in families and sibling pairs. The author of the study concluded that the trait might be dominant. In a family study, segregation analysis suggested an autosomal dominant inheritance of tone deafness with imperfect penetrance. One of the pedigrees is presented here. Based on the results, do you agree with this conclusion? Could perfect pitch and tone deafness be alleles of a gene for musical ability?

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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 18, Problem 8QP
Textbook Problem
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Single-Gene Mutations Cause Behavioral Disorders

The opposite of perfect pitch is tone deafness—the inability to identify musical notes. In one study, a bimodal distribution in populations was found, with frequent segregation in families and sibling pairs. The author of the study concluded that the trait might be dominant. In a family study, segregation analysis suggested an autosomal dominant inheritance of tone deafness with imperfect penetrance. One of the pedigrees is presented here. Based on the results, do you agree with this conclusion? Could perfect pitch and tone deafness be alleles of a gene for musical ability?

Summary Introduction

To determine: Whether the obtained results by the given pedigree analysis are satisfactory or not.

Introduction: The variations which occur in the genetic material of the organism from a source or randomly are called mutations. Single gene mutations can cause behavioral disorders in an organism.

Explanation of Solution

The obtained pedigree results show the presence of autosomal dominant inheritance. The traits are transferred from the parental generation to the offsprings...

Summary Introduction

To determine: The chances that tone deafness and perfect pitch can be alleles of a gene for musical ability.

Introduction: The variations which occur in the genetic material of the organisms from a source or randomly are called mutations. Single gene mutations can cause behavioral disorders in an organism.

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