Chapter 13, Problem 5.1Q

a.

Summary Introduction

To classify: The example of the increased sprinting performance of individuals with two different alleles of an actin gene, compared with individuals with two copies of just one of the alleles as frequency-dependent selection, heterozygote advantage, or clinical variation.

Introduction: Polymorphism refers to the occurrence of variation amongst the population. Polymorphism within a population maybe because of the three phenomenons: frequency-dependent selection, heterozygote advantage or clinical variation.

b.

Summary Introduction

To classify: The example of increased survival of individuals with rare color patterns, compared with those with common color patterns as frequency-dependent selection, heterozygote advantage, or clinical variation.

Introduction: Genetic variation is an important aspect of evolution. These variations are maintained in nature through different mechanisms.

c.

Summary Introduction

To classify: The example of geographic variation in the size of deer from northern to southern latitudes as frequency-dependent selection, heterozygote advantage, or clinical variation

Introduction: Geographical variations are also an important factor contributing to the genetic variations. Different geographical spaces will give rise to different genotypes.