If an experimenter is able to select for increased barking in a domesticated dog

Question

If an experimenter is able to select for increased barking in a domesticated dogs over four generations, then: There must have been genetic variation relevant to the development barking in the initial population in the experiment. Barking is probably very important to the reproductive success of dogs. We have proof that natural selection and artificial selection are somewhat different. The experimenter has shown that if dogs were to return to the wild, the population would evolve toward a higher level of barking in nature as well.

Explanation / Answer

The answer is

a. there must have been genetic variation relevant to the development of barking in the initial population in the experiment.

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