PRIN. OF LIFE (LOOSELEAF) W/LAUNCHPAD
PRIN. OF LIFE (LOOSELEAF) W/LAUNCHPAD
3rd Edition
ISBN: 9781319465377
Author: HILLIS
Publisher: MAC HIGHER
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Chapter 15, Problem 1.1Q
Summary Introduction

To determine: The means of differentiating the protein-coding genes that are evolving under positive selection from the ones evolving under stabilizing selection.

Introduction: Natural selection is a progressive evolutionary process which is brought about by the alteration in the inheritable characteristics in a group of individuals or populations over generations. This helps in the differential selection of the species and their reproduction based on the ability to adapt.

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Positive selection is the process where the extreme phenotypes are supported through evolution rather than the other existing phenotypes, whereas the stabilizing selection favors the traits that are most frequent in a protein-coding gene. The biologists can differentiate between the protein-coding genes exhibiting positive selection and stabilizing selection through the prevalence of different phenotypes in genes. The protein-coding genes that evolve into less frequent phenotypes like the extreme phenotypes is undergoing positive selection, and the population evolving into most frequent or mean phenotype of the coding genes is undergoing stabilizing selection.

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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY