Chapter 10, Problem 5PDT

Summary Introduction

To determine: Whether sexual selection is responsible for coloration in both sexes of parrots.

Introduction: Sexual selection results in the evolution of greatly exaggerated secondary sexual traits that do not help in evolution and adaptation. Instead, these traits often result in making that organism more vulnerable to the prey. However, a male that is able to transfer his genetic material in the coming generation is successful hence, these characters are adopted at an expense of survival strategy.

Summary Introduction

To explain: The role of sexual selection in pair bonding species with 1:1 sex ratio when every member has obtained a mate.

Introduction: Sex in some species is not determined only by chromosome but also their physical and social interactions. Primary cause of sexual traits is gonads but secondary sexual traits such as morphological appearance also plays direct role in reproduction.

Summary Introduction

To explain: The type of sexual selection that results in bright coloration in both sexes of species.

Introduction: Sexual selection is a type of selection where mates compete for the individual of the same sex. A male that attracts more females to mate will transfer more genes in next generations and would be genetically more successful.