AP BIOLOGY

Detailed explanation-1: -A homozygous genotype contains two identical alleles. An individual can either be homozygous dominant (ex: HH) or homozygous recessive (ex: hh). A heterozygous genotype contains two different alleles (ex: Hh).

Detailed explanation-2: -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-3: -So, the correct answer is ‘TT and tt’.

Detailed explanation-4: -(HEH-teh-roh-ZY-gus JEE-noh-tipe) The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).

Detailed explanation-5: -The Bombay blood group, also called hh, is deficient in expressing antigen H, meaning the RBC has no antigen H. For instance, in the AB blood group, both antigens A and B are found. A will have A antigens; B will have B antigens.