Which of the following is the best description for Epistasis? A. Two alleles keeping each other in equilibrium.
B. A recessive allele that controls the expression of a dominant allele in a different trait.
C. A state of being very close to equilibrium, but not quite there.
D. When two dominant alleles are present and are both expressed equally.

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:

i think its both a and b

what tree

explanation:

then go eat. lol.brainliest