1
A) gene flow B) genetic drift C) mutation D) inbreeding 2
A) process B) outcome C) mechanism D) purpose 3
A) natural theory B) nearly neutral theory C) neutral theory D) adaptive theory 4
A) rare B) frequent C) pervasive D) none of the above 5
A) directional selection B) stabilizing selection C) disruptive selection D) none of the above 6
A) gene therapy has alleviated the condition B) the disease is carried on a dominant allele C) individuals with one allele for sickle-cell anemia are resistant to malaria D) a combination of all of the above E) none of the above 7
A) how mutations can lead only to tragic outcomes B) why outbreeding is important C) the superior fitness seen in heterozygotes D) how every organism is an integrated gene complex 8
A) True B) False 9
A) homozygous for the sickle cell allele B) heterozygous for the sickle cell allele C) homozygous for the normal hemoglobin allele D) it doesn't matter; all are equally advantageous 10
A) homozygous for the sickle cell allele B) heterozygous for the sickle cell allele C) homozygous for the normal hemoglobin allele D) it doesn't matter; all are equally advantageous 11
A) 1 B) 5 C) 10 D) hundreds E) thousands 12
A) inbreeding B) outcrossing C) random mating D) clines E) polymorphic 13
A) mutation B) selection C) genetic drift D) electrophoresis E) gene flow 14
A) random mating B) migration C) mutation D) genetic drift E) inbreeding 15
A) dominant homozygotes B) recessive homozygotes C) dominant allele D) recessive allele E) heterozygotes 16
A) 2 cm B) greater than 2 cm or less than 2 cm C) greater than 2 cm and less than 2 cm D) can't tell from the information given 17
A) 2 cm B) greater than 2 cm or less than 2 cm C) greater than 2 cm and less than 2 cm D) can't tell from the information given 18
A) 2 cm B) greater than 2 cm or less than 2 cm C) greater than 2 cm and less than 2 cm D) can't tell from the information given 19
A) essentially all loci are polymorphic B) essentially no loci are polymorphic C) depending on the species, all loci are polymorphic or none are D) depending on the species, more or less than half the loci are polymorphic 20
A) 2% B) 5% C) 37% D) 55% E) 76% 21
A) individual variability provides the raw material for natural selection to act on B) genes cannot mutate unless they are polymorphic C) only heterozygous individuals are selected in natural populations D) the Hardy-Weinberg equilibrium is less likely to be disturbed in polymorphic populations E) none of the above; genetic polymorphism is not important to evolution 22
A) 0.8 B) 0.4 C) 0.6 D) 0.2 E) 0.1 23
A) 0.04 B) 0.16 C) 0.32 D) 0.48 E) 0.64 24
A) 0.04 B) 0.16 C) 0.32 D) 0.48 E) 0.64 25
A) 0.04 B) 0.16 C) 0.32 D) 0.48 E) 0.64 26
A) mutation B) migration C) genetic drift D) nonrandom mating E) selection 27
A) founder principle B) selection C) gene flow D) bottleneck effect E) adaptation 28
A) founder effect B) random mating C) genetic drift D) bottleneck effect 29
A) increases the rate of mutation B) increases the proportion of homozygous individuals in a population C) never occurs in plants D) all of the above E) none of the above 30
A) True B) False 31
A) True B) False 32
A) Mating must be random. B) The size of the population is small. C) There is no influx of genes from other populations. D) No genotype has selective advantage over another. 33
A) p2 B) 2pq C) q2 D) q 34
A) Fitness is the measure of an organism's adaptability to various habitats. B) Fitness reflects the number of mates each individual of the population selects. C) Fitness refers to the relative health of each individual in the population. D) Fitness is a measure of the contribution of a genotype to the gene pool of the next generation. 35
A) True B) False 36
A) directional selection B) stabilizing selection C) disruptive selection D) None of these is correct. 37
A) areas inhabited by humans B) very stable habitats C) desert D) savanna 38
A) The size of the population is very large. B) Individuals mate with one another at random. C) Natural selection is present. D) There is no source of new copies of alleles from outside the population. E) None of the answers is correct. 39
A) mutations B) founder effect C) artificial selection D) bottleneck effect E) outcrossing 40
A) a population with disruptive selection B) a population with directional selection C) a population with stabilizing selection D) a population with no selection E) none of the above 41
A) True B) False 42
A) True B) False 43
A) True B) False
2002 McGraw-Hill Higher Education