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Species of closely related animals can differ in the numbers of chromosomes they possess. For instance, red foxes have 68 chromosomes, whereas gray foxes have 66 chromosomes. Suppose all other variables except chromosome number are constant between the two species.
Which species would be expected to have the greatest genetic variability and for which reasons?
Red foxes, because the additional chromosomes contain additional alleles, which increase genetic variability.
Red foxes, because the genes are spread among more chromosomes which increases the rate of independent assortment.
Red foxes, because the additional chromosomes allow for an increased occurrence of recombination from crossing over.
Gray foxes, because, as the genes are packed more tightly within the genome, mutation rates increases.
Gray foxes, because the closer proximity of genes to one another will increase the rate of crossing over between genes.