Gene flow: Non-random mating: Genetic Drift: Founder Effect: Bottleneck Effect: Stabilizing Selection: Directional Selection; Disruptive (Diversifying) Selection: Sexual Selection: Speciation:
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- At the edge of the Arctic Circle, owls prey on field mice. Occasionally, in a litter of white field mice, a brown mouse appears. Because of greenhouse warming, the snow melts, changing the environment to shades of brown. What process causes the population to change colors? artificial selection natural selection migration behavioral isolationWhich of the following forces creates diversity? 1 - bottleneck effect 2- genetic drift 3 - mutation 4- natural selectionWhat scenario could lead to the founder effect in a population? Natural selection acting on genetic variation A large influx of new alleles from a neighboring population A few individuals leaving to start a new population in a different location
- Continental drift has isolated breeding populations, affecting patterns of evolution in organisms, by: Group of answer choices helping create gene flow producing higher planetary temperatures creating water and mountain barriers increasing random matingWhich of the following is a FALSE statement? Inbreeding non-random mating will increase the number of homozygotes. Directional selection will decrease genetic variation. Migration will decrease genetic variation between populations. Genetic drift will decrease genetic variation between populations. Mutation will increase genetic variation.Which of the following mechanisms will greatly affect changes in gene frequency of organisms with small population? Group of answer choices natural selection sexual selection genetic drift gene flow
- Of the ways that populations can evolve over time, is the only mechanism in which the environment selects for better adapted individuals whereas selects traits by random chance. genetic drift; natural selection natural selection; genetic drift genetic drift; gene flow gene flow; natural selectionPopulation divergence occurring as a result of females in a species consistently choosing males of a particular color is an example of ecological speciation Haldane's Rule genetic drift sexual selectionWhich of the following is a TRUE statement? Non-random mating will increase the number of heterozygotes. Genetic drift within a population will increase genetic variation. Migration into the population will decrease genetic variation. Mutation will decrease genetic variation. Stabilizing selection will increase genetic variation.
- In sympatric speciation (fill in the blank) can result in (fill in the blank) and lead to formation of new species from a population that (fill in the blank) fill in the blank with the following: is geographically isolated, gene flow, reproduction isolation, is in the same environment, genetic drift, or ecological isolationThe founder effect is related to genetic drift, and the bottleneck effect is related to genetic drift. assortative mating. mutation. selection.Which of these conditions should completely prevent the occurrence of natural selection in a population over time? Group of answer choices Variation between individuals is not heritable. The environment is changing at a relatively slow rate. The population lives in a habitat where there are no competing species present. The population size is large.