The recessive trait will always been seen.

i believe the correct answer is d

the correct answer to this question is #5

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

c is the answer to this question. altitude affects the weather because air molecules evaporate.