Question

Adult female monkeys from one population breed with male monkeys of a nearby population. The introduction of new alleles into the first populations gene pool is an example of

Answer 1

New World monkeys live in tropical forests of South and Central America.
All are arboreal with long tails.
Some New World monkeys possess prehensile or grasping tails, which they use as a fifth limb.

Answer 2

Gene flow, as a migrant is introducing new genes into a population.