Which is the correct expression of a heterozygous genotype for a recessive genetic disorder?. a A aa Aa

Aa

Explanation: Alleles can be dominant or recessive. A dominant allele is one which has the ability to manifest itself outwardly in the presence of a recessive allele. A dominant allele is usually written in upper case such as A, T, B.

A recessive allele is one which cannot express itself in the presence of a dominant allele. It is usually written in lower case such as a, t, b. A heterozygous allele has one dominant and one recessive allele, for example Aa, Tt, Bb.

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:

potentially fatal issues such as heart attacks and strokes

explanation: