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Facts Of Life
Chapters 17, 18, and 19 Test
| Question | Answer |
|---|---|
| organisms change over time. | conclusion by Darwin |
| evolution that focuses on changes in the gene pools of populations | microevolution |
| evolution that focuses on changes that give rise to new species | macroevolution |
| a change in the genetic characteristics of a population of organisms over time. | evolution |
| differences in DNA sequences between the individuals in a population. | Results of Mutation |
| Arise from mutation | different alleles |
| new individuals contribute their alleles to the gene pool of a population | gene flow |
| Chance events that affect the survival and reproduction of individuals in a population | genetic drift |
| Three quarters of the flowers will be gray and one-quarter will be white. | phenotype frequency of progeny of heterozygotes |
| is the principal cause of evolutionary change. | variation acted on by natural selection |
| Evidence that support the hypothesis because dark-colored mice were attacked more in light environments and light-colored mice were attacked more in dark environments | adaptation by natural selection |
| Natural selection acted on the genetic variability present in the organism’s genomes.; | evolution |
| Adaptation by natural selection | nonrandom selection |
| Evidence that a humans and chimpanzees share a recent common ancestor | homologous structures |
| Number of individuals in a population with 200 alleles for each gene | 100 |
| The frequency of q when p= 0.8 | 0.2 |
| Genotype frequency | genotype/total genotypes |
| Rate of evolution of an organisms that reproduces slowly | slow evolution |
| Effect of stable environmental conditions on evolution | does not stimulate evolution |
| high mutation rate of HIV. | stimulate rapid evolution leads drug resistance |
| appear without regard to environmental pressures | mutations |
| makes the genetic composition of the two populations more similar. | gene flow |
| Greater effect on small populations than on large populations | genetic drift |
| Frequency of an allele = 1 | allele fixation by genetic drift |
| Bottleneck effect | type of genetic drift loss of genetic variation |
| Stabilizing selection | emliominatoin of extreme in a bell curve |
Created by:
awkhholly
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