AP BIOLOGY

Detailed explanation-1: -Some alleles are dominant, while others are recessive. The dominant allele is expressed more strongly, so it masks the recessive allele. However, in a homozygous genotype, this interaction doesn’t occur. You either have two dominant alleles (homozygous dominant) or two recessive alleles (homozygous recessive).

Detailed explanation-2: -Homozygous means that the organism has two copies of the same allele for a gene. An organism can be homozygous dominant, if it carries two copies of the same dominant allele, or homozygous recessive, if it carries two copies of the same recessive allele.

Detailed explanation-3: -If it’s dominant, it means only one mutated copy is needed to result in disease. This is called a “dominant disease” or “dominant disorder.” If you’re heterozygous for a dominant disorder, you have a higher risk of developing it. On the other hand, if you’re heterozygous for a recessive mutation, you won’t get it.

Detailed explanation-4: -homozygote, an organism with identical pairs of genes (or alleles) for a specific trait. If both of the two gametes (sex cells) that fuse during fertilization carry the same form of the gene for a specific trait, the organism is said to be homozygous for that trait.