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BIOS 103 Test 2

QuestionAnswer
Natural selection changes allele frequencies because some _______ survive and reproduce more successfully than others. Individuals
No two people are genetically identical, except for identical twins. The main source of genetic variation among human individuals is The reshuffling of alleles in sexual reproduction
Sparrows with average-sized wings survive severe storms better than those with longer or shorter wings, illustratin Stabilizing selection
There are 40 individuals in population 1, all with genotype A1A1, and there are 25 individuals in population 2, all with genotype A2A2. Assume that these populations are located far from each other and that their environmental conditions are very similar. Genetic drift
In the context of populations, how do we define evolution?
Which of the follow can alter gene frequencies? Genetic drift, genetic flow, natural selection? All of the above can alter gene frequencies.
Which example below correctly describes average heterozygosity? Average heterozygosity refers to the average percentage of loci that are heterozygous in a population.
What is a cline? A cline is a graded change in a trait along a geographic axis.
Which of the following sets of conditions is required for Hardy-Weinberg equilibrium random mating, no natural selection, and a large population
Antibiotic resistance in bacteria is an example of which of the following? Directional selection
A population of squirrels is preyed on by small hawks. Smaller squirrels can escape into burrows, larger squirrels can fight hawks. Generations later, the squirrels in the area tend to be very small or very large. What is responsible for this outcome? Disruptional selection
Stabilizing selection _____ Favors intermediate variants in a population
Created by: Mware1219
 

 



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