Question

The largest unit in which gene flow is possible is a ______.

Options

• population

• species

• genus

• subspecies

Answer 1

The largest unit in which gene flow is possible is a species.

Explanation: 

Gene flow refers to the transfer of alleles or genes from one population to another. Since populations within a species can interbreed and exchange genes, gene flow occurs within the limits of a species. Gene flow typically does not occur between different species, genera, or subspecies, as these are often reproductively isolated to varying degrees. Therefore, the species is considered the largest unit in which gene flow can take place.