Arctic foxes typically have a white coat in the winter. in summer, when there is no snow on the ground, the foxes typically have a darker coat. which of the following is most likely responsible for the seasonal change in coat color?
(a) the decrease in the amount of daylight in winter causes a change in gene expression, which results in the foxes growing a lighter- appearing coat.
(b) the diet of the foxes in summer lacks a particular nutrient, which causes the foxes to lose their white coat and grow a darker- colored coat.
(c) competition for mates in the spring causes each fox to increase its camouflage with the environment by producing a darker- appearing coat.
(d) the lower temperatures in winter denature the pigment molecules in the arctic fox coat, causing the coat to become lighter in color.

The decrease in the amount of daylight in winter causes a change in gene expression, which results in foxes growing a lighter - appearing coat.

Explanation:

With less quantity of sunlight during winter days, the arctic fox is not able to produce melanin, the natural pigment that changes the hair color into brownish color. In summer days, is the opposite effect, in this way, the hair of the fox turns into brown - gray color.

(A) The decrease in the amount of daylight in winter causes a change in gene expression, which results in the foxes growing a lighter- appearing coat.

Explanation:

environmental factors cause changes in gene expression which results in seasonal changes

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."