Chapter 15, Problem 1TC

Summary Introduction

(a) To explain:

How natural selection was responsible for the phenomenon happened at the second farm.

Introduction:

The term “natural selection” was given and popularized by Charles Darwin . Simply, it is defined as “survival of the fittest”. It is the differential survival of organisms on the basis of their phenotype and genotype. Natural selection is the key to evolution.

Summary Introduction

(b) To describe:

The form of selection occurring at the second farm.

Introduction:

Selection is a process that refers to the survival, growth, and reproduction of certain preferential genotypes. Selection could be natural or artificial.

Summary Introduction

(c) To identify:

The insects which are still in equilibrium.

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:

Here, represents genotype frequencies of homozygotes AA.

represents genotype frequencies of homozygotes aa.

represents genotype frequencies of heterozygotes Aa.