Question

all of the genes in the bodies of all members of a given species or population make up a
gene pool
genotype
gene frequency
gene flow

Explanation:

The gene pool is defined as the total collection of genes in all members of a species or population. A genotype refers to the genetic constitution of an individual. Gene frequency is the proportion of a particular allele in a gene pool. Gene flow is the transfer of genetic material from one population to another.

Answer:

A. gene pool