Xeroderma pigmentosum is an autosomal recessive trait resulting in extreme sensitivity to ultraviolet (UV) rays from sunlight in affected individuals. If the number of Xeroderma pigmentosum (pp) individuals in a particular population is 11%, 1. What is the frequency of the recessive allele in the population?
2. What is the frequency of the hom ozygous dominant and heterozygous individuals?
3. If the number of Xeroderma pigmentosum individuals goes from 11% to 6% then 3% over 3 generations, what does this indicate?
4. What is the frequency of the dominant allele if 3% of the population has xeroderma pigmentosum?
5. Predict a reason why this change in the number of individuals may have occurred over 3 generations.

I think it's 4) or 2)

Explanation:

Also please give me a Brainliest crown

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.