Question

which of the following best defines a gene pool?
the sum of all genetic traits in a populations individuals at a given time
any movement of genes from one population to another
any movement of organisms from one environment to another
the random change in the frequency of an allele in a population

Explanation:

A gene pool is defined as the sum of all genetic traits (genes and alleles) in a population's individuals at a given time. Movement of genes between populations is gene flow. Movement of organisms is migration. Random change in allele frequency is genetic drift.

Answer:

the sum of all genetic traits in a population's individuals at a given time