18. in a species of wild animal, claw size is determined by a combination of two alleles. allele q codes for large claws, while allele q codes for small claws. individuals with a heterozygous genotype possess claws of medium size. members of the species depend on their claws to be able to burrow in the ground and find food. but in an area where the ground has always been soft, gradual climate change has caused the dirt to become hard and compact. which statement best predicts the change that will occur in the affected populations?
a. allele q will decrease in frequency.

b. allele q will become dominant to allele q.

c. allele q will become dominant to allele q.

d. allele q will decrease in frequency.

What is mitosis and how does it affect change

Can someone me with this and tell me what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)—two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.