Chapter 20.3, Problem 2R

Summary Introduction

To analyze:

The genotypic frequency of the allele ‘Aa’ within the population of toads.

Introduction:

The Hardy–Weinberg equation can be used to calculate genotypic and allele frequency in a population. These equations are based on the Hardy–Weinberg equilibrium. The equation can be mathematically represented as follows:

$p+q=1$

$p^2+2pq+q^2=1$

Where, p denotes the dominant allele frequency, q is the recessive allele frequency, p² denotes the homozygous dominant individual’s frequency, q² denotes the homozygous recessive individual’s frequency, and 2pq denotes the frequency of the heterozygous individuals.

Given:

Allele frequency for allele A (p) = 0.2

Allele frequency for allele a (q) = 0.8