Final answer:
The genes of all members of a population make up the population's gene pool, which includes all the different alleles that exist in the population.
Step-by-step explanation:
The genes of all members of a particular population make up the population's gene pool, which includes all the different alleles for each gene that exist in the population. The gene pool represents the genetic diversity within a population and is what allows for genetic variation and evolution to occur.
For example, in the ABO blood type system in humans, there are three alleles that determine the blood type. Each individual in the population can only carry two alleles, but the population as a whole can have multiple alleles for the gene.