Question

Over the last several decades, the scientific community has gathered a large amount of information regarding genetics and genetic variation. What are two main sources that lead to increased genetic variation?

Selective breeding

Gamete mutations

Recombination

Genetic drift

I have looked all in my notes and can't find anything on this topic.

Answer 1

The correct answer is recombination.

Answer 2

The two main sources that lead to increased genetic variation are gamete mutations and recombination.
A gamete is the cell which combines with another cell during fertilization. So, its mutation can lead to variation in genes. Recombination as well, as the position of genes is changed.