The largest unit within which gene flow can readily occur is a ________. Group of answer choicesgenuspopulationhybridspecies

The largest unit within which gene flow can readily occur is a species.

Explanation:

Gene flow is the transfer of genetic material between separate populations, and it primarily occurs between individuals of the same species. Members of a species typically share a common gene pool, meaning they can interbreed and exchange genes, which is essential for maintaining genetic diversity.

Though populations (a smaller group often found in a specific area) may experience gene flow, it doesn't happen as extensively as it would within a species. Hybrids, usually resulting from mating between different species, represent a more restricted genetic exchange. Meanwhile, a genus encompasses multiple species, making it too broad to define the primary unit of gene flow. Therefore, for the context of gene exchange, "species" is the most accurate choice.