WHAT IS LIFE? W/LAUNCHPAD 5/18 >C<
WHAT IS LIFE? W/LAUNCHPAD 5/18 >C<
4th Edition
ISBN: 9781319232337
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 10, Problem 7MC
Summary Introduction

Introduction:

Stabilizing selection is one of the ways in which natural selection alters the allelic frequencies in a population.

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If the X3 allele is undergoing positive selection, what will be the likely end result? A There will be no individuals that are X3X3 B All individuals will be X1X3 or X2X3 because of the heterozygote advantage. C The variance of the trait will stay the same, but the mean value will increase. D The frequency of X3 will increase and it could potentially become fixed in the population. e The allele frequency of X1 and X2 will stay the same, but the allele frequency of X3 will increase.
Saying that a quantitative trait follows a continuum means thata. the numerical value for the trait increases with the age ofthe individual.b. environmental effects are additive.c. the phenotypes for the trait are continuous and do not fallinto discrete categories.d. the trait continuously changes during the life of an individual.
Stabilizing selection on a trait tends toa. make the trait more extreme.b. reduce variability in the trait.c. decrease the frequency of alleles associated with the trait.d. result in elaborate male ornaments.
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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY