Considerably more phenotypic variation exists in domesticated varieties of species like dogs and cabbages than exists in non-domesticated species like lions and maple trees.Which one of the following statements best explains why this is true?
A)There is no selection and mating is random under domestication.
B)During domestication,very high rates of mutation are induced.
C)Genetic drift is important because domestication involves small populations.
D)Many domesticated varieties would not survive in the natural world.
E)Domesticated species exhibit "hybrid vigor" (heterosis).

Question

Quizplus · Accepted Answer

Many domesticated varieties would not survive in the natural world, because they have been selectively bred for specific traits by humans rather than natural selection. This has led to a reduction in genetic diversity within domesticated populations, as well as traits that would not necessarily increase an individual's fitness in the wild. In contrast, non-domesticated species like lions and maple trees are subject to natural selection and have a wider range of phenotypic variation due to both genetic and environmental factors.

Considerably More Phenotypic Variation Exists in Domesticated Varieties of Species