LIFE:SCIENCE OF BIOL.(LL) >CUSTOM<
LIFE:SCIENCE OF BIOL.(LL) >CUSTOM<
11th Edition
ISBN: 9781319209957
Author: Sadava
Publisher: MAC HIGHER
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Chapter 19.5, Problem 2R
Summary Introduction

To review:

The differences between marine and freshwater sticklebacks that exemplify the parallel evolution in them via the changes in the gene regulation.

Introduction:

Fishes do not evolve the new features instantly. Rather, they may retain their ancient genetic adaptations. During evolution, some genes are suppressed and others can be expressed depending upon the environmental conditions. The evolution of sticklebacks is believed to be accelerated by using the preexisting variations in their genetic makeup, instead of mutations instantly caused by nature.

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