In which of the following pairs do both evolutionary processes introduce new genetic variation into a population?Question 5Select one:a.natural selection and genetic driftb.mutation and gene flowc.natural selection and gene flowd.gene flow and genetic drift
Question
In which of the following pairs do both evolutionary processes introduce new genetic variation into a population?Question 5Select one:a.natural selection and genetic driftb.mutation and gene flowc.natural selection and gene flowd.gene flow and genetic drift
Solution
The correct answer is b. Mutation and gene flow.
Here's why:
a. Natural selection and genetic drift - Natural selection does not introduce new genetic variation into a population. It only works on existing genetic variation. Genetic drift, on the other hand, can lead to a change in the population's gene pool, but it does not introduce new genetic variation.
b. Mutation and gene flow - Mutation is the source of new genetic variation in populations. It introduces new alleles into a population. Gene flow, which is the transfer of alleles from one population to another, can also introduce new genetic variation if the incoming individuals have different alleles than the ones already present in the population.
c. Natural selection and gene flow - As mentioned before, natural selection does not introduce new genetic variation. Gene flow can introduce new genetic variation, but only if the incoming individuals have different alleles.
d. Gene flow and genetic drift - While gene flow can introduce new genetic variation, genetic drift does not. It only leads to a change in the population's gene pool.
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