The total collection of alleles in a population at any one time makes up that population's a. genotype b. gene pool c. allele frequency d. heterozygote frequency

The answer is b. gene pool

Total number of allele should be called gene pool. If one of the allele is compared to the gene pool, you will got the specific allele frequency. Genotype is the genetic type of a individual that was derived from the combination of their allele pair.

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im not intirely sure but i think the anwser is d relative humidity