Question

if any population has reduced genetic variability what happens

Answer 1

These changes in relative allele frequency, called genetic drift, can either increase or decrease by chance over time. Typically, genetic driftoccurs in small populations, where infrequently-occurring alleles face agreater chance of being lost. ... Both possibilities decrease the genetic diversity of a population.

Answer 2

Answer:

Without genetic variation, a populationcannot evolve in response to changing environmental variables and, as aresult, may face an increased risk ofextinction. For example, if a population is exposed to a new disease, selection will act on genes for resistance to the disease if they exist in the population.

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