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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 10, Problem 17QP
Textbook Problem
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Knowing that individuals who are homozygous for the GD allele show no symptoms of galactosemia, is it surprising that galactosemia is a recessive disease? Why?

Summary Introduction

To explain: The reason for individuals with homozygosity for GD allele showing no symptoms of galactosemia, even though galactosemia is an autosomal recessive disease.

Introduction: Galactosemia is an autosomal disease in which the body is not able to metabolize galactose. Inheritance of this disease takes place in autosomal recessive manner from one generation to another. Gene responsible for this disease has multiple allelic forms, G, g, and GD. frequency of occurrence of this disease in a population is very low.

Explanation of Solution

Galactosemia is an autosomal recessive disease. Genes responsible for causing galactosemia have multiple allelic forms, G, g, and GD. Even after being an autosomal recessive condition, individuals showing homozygisity for GD do ...

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