Chapter 16, Problem 4TS

Summary Introduction

To determine:

The percentage of human population having dominant phenotype if 1% of population has the recessive phenotype.

Introduction:

Hardy-Weinberg principle is used to determine whether a population is in equilibrium or not. Hardy-Weinberg principle states that genetic variations in a population would remain constant if there are no external disturbing factors. Mathematically, it can be written as follows:

${\text{p}}^{\text{2}}{\text{+2pq+q}}^{\text{2}}\text{=1}$

Here, p² represents genotype frequencies of homozygotes AA.

q² represents genotype frequencies of homozygotes aa.

2pq represents genotype frequencies of heterozygotes Aa.