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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 5, Problem 18QP
Textbook Problem
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If monozygotic twins show complete concordance for a trait, whether they are reared together or apart, what does this suggest about the heritability of the trait?

Summary Introduction

To determine: Whether the monozygotic twins are reared together or are apart when they show complete concordance for a trait and its suggestion about the heritability of the trait.

Introduction: The concordance value is defined as the agreement between the traits that are exhibited by both the twins. Traits show concordance if both have a trait and are discordant if only one twin has that trait. Monozygotic twins have 100% identical genetic material between them.

Explanation of Solution

Heritability is defined as the proportion of phenotypic variation that is caused by differences in the genotype. Concordance is defined as the probability that a pair of people will have the same trait.

Monozygotic twins have the same genotype. If concordance is 100%, and they are reared apart, it means that both the twins have the presence of the trait...

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