Which of the Following is a Source of Genetic Variation

Question

Which of the following is a source of genetic variation?
A)recombination
B)bottlenecks
C)natural selection
D)genetic drift
E)adaptations

Accepted Answer

Recombination, also known as crossing over, during meiosis is a source of genetic variation. It results in the creation of new combinations of alleles on chromosomes. Bottlenecks, genetic drift, and natural selection can also affect genetic variability, but they do not create new genetic variation like recombination does. Adaptations are a result of natural selection acting on existing genetic variation.