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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 14, Problem 1SQ
Textbook Problem
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Constructing a pedigree is particularly useful when studying inheritance patterns in organisms that ________.

  1. a. produce many offspring per generation
  2. b. produce few offspring per generation
  3. c. have a very large chromosome number
  4. d. have a fast life cycle

Summary Introduction

Introduction: A pedigree depicts the interrelationships between parents and offspring over generations for a particular trait. It is also referred to as a family tree. Individuals and relations are denoted by symbols and lines. It contributes in predicting the occurrence of that particular trait in future generations through inheritance patterns and genotyping the individuals.

Explanation of Solution

Reason for the correct statement:

The construction of a pedigree is generally the first step for the identification of a gene variant responsible for the causation of a specific trait or disease. The pedigree is constructed to determine inheritance pattern in organisms where crosses are not feasible, that is, organisms with few offspring per generation or organisms with long generation times.

 Hence, option b. is correct.

Reasons for the incorrect statement:

Option a. is given as “produce many offspring per generation”. The inheritance pattern in organisms that produce many offspring per generation can be determined through crosses...

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