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Bio Chapter 19 Quiz

QuestionAnswer
What is the difference between micro and macroevolution? microevolution describes the evolution of organisms in populations, while macroevolution describes the evolution of species over long periods of time
population genetics is the study of how selective forces change the allele frequencies in a population over time the genetic basis of population wide traits whether traits have a genetic basis the degree of inbreeding in a population how selective forces change the allele frequencies in a population over time
Which of the following populations is not in the Hardy-Weinberg equilibrium? a population undergoing natural selection a population in which the allele frequencies do not change over time p^2+2pq+q^2 =1 a population undergoing natural selection
One of the original Amish colonies rose from a ship of colonists. The ship's captain had polydactyly (rare dominant trait). Now we see a much higher frequency of polydactyly in Amish population. natural selection genetic drift founder effect b and c b and c
When male lions reach sexual maturity, they leave their group in search of a new pride. This can alter the allele frequencies of the population through which of the following mechanisms? natural selection genetic drift gene flow random mating gene flow
Which of the following evolutionary forces can introduce new genetic variation into a population? natural selection and genetic drift mutation and gene flow natural selection and nonrandom mating mutation and genetic drift mutation and gene flow
What is assortative mating? when individuals mate with those who are... similar to themselves the most fit in the population the least fit in the population dissimilar to themselves when individuals mate with those who are similar to themselves
When closely related individuals mate with each other, or inbreed, the offspring are often not as fit as the offspring of two unrelated individuals. Why? Inbreeding can bring together rare, deleterious mutations that lead to harmful phenotypes.
What is a cline? gradual geographic variation across an ecological gradient the number of individuals in the population degree to which mutation helps an individual to survive slope of a mountain where a population lives gradual geographic variation across an ecological gradient
Which type of selection results in greater genetic variance in a population? stabilizing selection directional selection diversifying selection positive frequency-dependent selection diversifying selection
When males and females of a population look or act differently, it is referred to as sexual dimorphism sexual selection diversifying selection a cline sexual dimorphism
The good genes hypothesis is a theory that explains what? why individuals of one sex develop impressive ornamental traits
Created by: mortehay000
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