Chapter 23, Problem 10TYPSS

Summary Introduction

To review:

Comparison of fundamental asymmetry of sex and sexual dimorphism between the two-monkey species.

Introduction:

According to the Bateman–Trivers hypothesis, two processes are involved namely pattern and process. In this, the pattern refers to the trait, which attracts the members of the opposite sex and it is highly expanded in the males. In the process, high energy expense is required for the formation of large egg, whereas the sperms contain few energetic resources. Consequently, females in most species invest more in their offsprings in comparison to males.

During study of several species of monkeys in one case, males never helped females to raise offspring. While in another case, males provided just as much parental care as females except for actually carrying the fetus during pregnancy.