Human Biology : Concepts and Current Issues - With Access
7th Edition
ISBN: 9780321874856
Author: Johnson
Publisher: PEARSON
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Chapter 22, Problem 2AWK
Summary Introduction
To review:
The effect of an increase in the gene flow in the human population on the human
Introduction:
Movement of individuals into (immigration) or out of (emigration) the population can affect the gene pool of a particular population. Gene flow means a geographical redistribution of alleles. Gene flow can lead to mixing pools of genes that might not otherwise mix.
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Chapter 22 Solutions
Human Biology : Concepts and Current Issues - With Access
Ch. 22 - Do you think the skeletons of Liang Bua Cave...Ch. 22 - Is it important that we try to discover the...Ch. 22 - Describe the three key elements of evolution.Ch. 22 - Explain how a fossil is created.Ch. 22 - List some of the main sources of evidence for...Ch. 22 - Prob. 4CRCh. 22 - Prob. 5CRCh. 22 - Prob. 6CRCh. 22 - Explain how rising atmospheric concentrations of...Ch. 22 - List the features that make Hominidae different...
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- Natural Selection Affects the Frequency of Genetic Disorders Will a recessive allele that is lethal in the homozygous condition ever be completely removed from a large population by natural selection?arrow_forwardIn which of the following pairs do both evolutionary processes introduce new genetic variation into a population? a. natural selection and genetic drift b. mutation and gene flow c. natural selection and gene flow d. gene flow and genetic driftarrow_forwardHow Can We Measure Allele Frequencies in Populations? Explain the connection between changes in population allele frequencies and evolution, and relate this to the observations made by Wallace and Darwin concerning natural selection.arrow_forward
- Figure 11.7 Do you think genetic drift would happen more quickly on an island or on the mainland?arrow_forwardExplain how genetic drift and gene flow affect populationsarrow_forwardWhat do you think would be the genetic and evolutionary consequences to the population if it was not subject to natural selection?arrow_forward
- If 98 out of 200 individuals in a population express the recessive phenotype, what percent of the population are heterozygotes?arrow_forwardScientific studies have shown that the majority of human genetic differences worldwide exist within groups (or races) rather than between groups. True or false?arrow_forwardHow do we know whether the genetic structure of a populationis static or dynamic?arrow_forward
- If 60 percent of the loci in a gene pool are dominant for the hair color trait H, and 40 percent are recessive (h), then according to Hardy-Weinberg theory, what percentage of the individuals in the population will be recessive for this trait (hh)? A. 16 B. 40 C. 36 D. 24arrow_forwardWhy is genetic variability necessary in a population? What can happen if genetic variability is reduced?arrow_forwardOrganisms heterozygous for a recessive trait are often called carriers of that trait. What does that mean?arrow_forward
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