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Pedigree Analysis Is a Basic Method in Human Genetics Pedigree analysis permits all of the following except: a. an orderly presentation of family information b. the determination of whether a trait is genetic c. the determination of whether a trait is dominant or recessive d. an understanding of which gene is involved in a heritable disorder e. the determination of whether a trait is sex-linked or autosomal

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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 4, Problem 2QP
Textbook Problem
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Pedigree Analysis Is a Basic Method in Human Genetics

Pedigree analysis permits all of the following except:

  1. a. an orderly presentation of family information
  2. b. the determination of whether a trait is genetic
  3. c. the determination of whether a trait is dominant or recessive
  4. d. an understanding of which gene is involved in a heritable disorder
  5. e. the determination of whether a trait is sex-linked or autosomal

Summary Introduction

Introduction: Pedigree analysis is the symbolic representation of the presence or absence of traits in a particular family. In the pedigree chart, a particular trait is represented by the particular symbol. It is used to determine the risk of a genetic disorder to an individual.

Explanation of Solution

Reason for correct answer:

A pedigree chart is does not indicate the kind of genes that are involved in heritable disorders. It can only indicate about the pattern of inheritance which includes whether a trait is inherited in autosomal or sex-linked mechanism.

Option d is given as “an understanding of which gene is involved in heritable disorder”

A pedigree chart is constructed on the basis of family history of an individual. So, the inheritance of the genes involved in congenital disease cannot be predicted by a pedigree chart. Hence, the correct answer is option d.

Reasons for the incorrect answer:

Option a. is given as “an orderly presentation of family information”

A pedigree chart is a tree which provides the genetic information of a family in an orderly manner. Hence, option a. is incorrect.

Option b. is given as “whether a trait is genetic”

Pedigree analysis helps in determination of a genetic trait...

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