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Bio exam 4 Chapter 16 Evolution of populations

Terms in this set (21)

All the members of a single species occupying a particular area at the same time comprise a _____.
(A) Community;
(B) population;
(C) neighborhood;
(D) family
(B) population
All of the alleles on the chromosomes of all individuals make up the _____ of the population.
(A) Gametes;
(B) zygotes;
(C) gene pool
(D) phenotype
(C) gene pool
Among a population of 100 wolves [where (G)rey is a dominant color over white (g)], there are 16 white wolves. What
is the frequency of the dominant allele in the population?
(A) 0.16;
(B) 0.4;
(C) 0.84;
(D) 0.6
(D) 0.6
What is the frequency of the recessive allele in a population of 100 individuals with the following numbers of
genotypes: 36 BB, 48Bb, 16bb?
(A) 0.2
(B) 0.4
(C) 0.6
(D) 0.8
(B) 0.4
In the Hardy-Weinberg equation, the term "
2pq" stands for the frequency of the __________ genotypes.
(A) Homozygous dominant;
(B) homozygous recessive;
(C) heterozygous
(C) heterozygous
The Hardy and Weinberg expression (p
(2+ 2pq +q2) can be used to calculate the ___________of a population of known size.
(A) Genotypic frequencies;
(B) number of individuals with specific characteristics;
(C) both A and B
(C) both A and B
Any deviation from Hardy-Weinberg equilibrium in allele frequencies in a population ________
(A) indicates evolution is occurring;
(B) means nothing;
(C) indicates that evolution is not occurring
(A) indicates evolution is occurring
The shift in the population of peppered moths from 10% dark-colored moths prior to the industrial revolution in Great
Britain, to 80% dark-colored moths, after the advent of industry illustrates _____.
(A) Microevolution;
(B) Macroevolution;
(C) Industrial melanism;
(D) both A and C
(D) both A and C
A condition that can help maintain Hardy-Weinberg equilibrium is: (A) Mutation;
(B) genetic drift;
(C) random mating
(D) Selection
(C) random mating
Gene flow can increase the variation within a population by introducing novel alleles from some other population.
(A) True
(B) False
(A) True
Random mating occurs when _____
(A) individuals pair by chance;
(B) individuals pair according to genotypes,
(C) individuals pair according to phenotypes,
(D) females chose a mate based on his ability to provide
(A) individuals pair by chance
Which of the following might be a cause of genetic drift?
(A) overharvesting;
(B) habitat loss;
(C) earthquake;
(D) all of the above
(D) all of the above
When the majority of genotypes are prevented from participating in the production of the next generation, _____ has
occurred.
(A) the bottleneck effect;
(B) disruptive selection;
(C) gene flow;
(D) random mating
(A) the bottleneck effect
A recessive allele that causes polydactylism is found in a significant percentage of the Pennsylvania Amish and is
thought to have occurred when a small colony was isolated from the larger population. The descriptive term for this
type of genetic drift is:
(A) Stabilizing selection;
(B) Sexual selection;
(C) the Founder Effect,
(D) Industrial melanism
(C) the Founder effect
Gene mutations are the ultimate source of variation in
(A) Prokaryotes;
(B) Protista,
C) Arthropods;
(D) Primates
(A) prokaryotes
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