Chapter 20.4, Problem 2R

Summary Introduction

To review:

The reason behind considering the human birth weight to be stabilizing rather than directional.

Introduction:

The natural selection is the process by which the organism adapts to the existing environment in order to have a better chance of survival. The natural selection follows three types of selection patterns depending on the circumstances. These are stabilizing, directional, and disruptive. In the stabilizing population, an average phenotype is promoted and in the disruptive selection, the extreme phenotypes are promoted. In the directional selection, one specific and extreme phenotype is promoted.