An allele is
A. another word for a gene
B. a homozygous genotype
C. a heterozygous genotype
D. A variant form of a gene

2%? i tried finding the exact sorry if it's not 100% correct ; -;

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: