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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 3, Problem 33QP
Textbook Problem
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Meiosis Explains Mendel’s Results: Genes Are on Chromosomes

A man with blood type A and a woman with blood type B have three children: a daughter with type AB and two sons, one with type B and one with type O blood. What are the genotypes of the parents?

Summary Introduction

To predict: The genotype of the parents with three children of blood group AB, B and O.

Introduction: The human blood group is an example of codominance where the alleles for the two antigens A and B are equally dominant. It means that when the two antigens A and B are present, the blood group is AB whereas in the absence of both the antigens, the blood group is O.

Explanation of Solution

The alleles for the blood group A are represented as “IA IA,” and for blood group B, it is represented as “IB IB” whereas for blood group O it is represented as “ii.” The genotype for the parents, whose three children are born with blood group AB, B, and O, are as follows:

  GametesIAi

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Chapter 3 Solutions

Human Heredity: Principles and Issues (MindTap Course List)
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