Which mechanism(s) are responsible for introducing new alleles into a population's gene pool?
A) gene flow
B) emigration
C) niche shift
D) natural selection

Gene flow is a process of gene migration or the transfer of gene variant (also called allele, which is responsible for genetic variation in population) from one population to another population.

As a consequence of gene migration, new alleles are introduced or added in the already existing population, thereby increasing genetic diversity.

Thus, option A) is the right answer.

Which mechanism(s) are responsible for introducing new alleles into a population's gene pool? A) gene flow B) emigration C) niche shift D) natural selection

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Which mechanism(s) are responsible for introducing new alleles into a population's gene pool?
A) gene flow
B) emigration
C) niche shift
D) natural selection