Evolution
Evolution
4th Edition
ISBN: 9781605356051
Author: Douglas Futuyma, Mark Kirkpatrick
Publisher: SINAUER
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Chapter 6, Problem 4PDT
Summary Introduction

To determine: The reason why phenotypic variations due to the inheritance of single allele are very unusual to observe.

Introduction: Sex determining factors, which are also called sex chromosomes, are responsible for determining sex in organisms. XX chromosomes in females and XY chromosomes in males are responsible for determining sex. The sex of a child depends upon male as males may transfer either X or Y but female transfers only X. It has been seen that the inheritance of a single allele can cause phenotypic variation, which is very unusual to observe.

Summary Introduction

To determine: The reason why it is difficult to tell at a glance that which allele is present in which organism.

Introduction: Sex determining factors, which are also called sex chromosomes, are responsible for determining sex in organisms. XX chromosomes in females and XY chromosomes in males are responsible for determining sex. The sex of a child depends upon male as males may transfer either X or Y but female transfers only X. It has been seen that the inheritance of single allele can cause phenotypic variation which is very unusual to observe.

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