AP BIOLOGY

Detailed explanation-1: -Hh is an example of a heterozygous gene. A heterozygous gene is a gene that carries two different alleles and can be represented by a small letter and a big letter (Hh or hH).

Detailed explanation-2: -The different types of genotypes are-homozygous recessive (pp), homozygous dominant (PP), and heterozygous (Pp). The homozygous dominant and the heterozygous genotypes show the same phenotypes.

Detailed explanation-3: -For example, BB, Bb, bb could be used to represent a given variant in a gene. Genotypes can also be represented by the actual DNA sequence at a specific location, such as CC, CT, TT.