AP BIOLOGY

Detailed explanation-1: -What is a Homozygous Recessive Genotype? A homozygous recessive genotype, as mentioned above, has two recessive alleles. In genetics, this is designated with two of the same lower case letters such as aa. This shows the genes that were inherited from each parent were recessive.

Detailed explanation-2: -F1 Genotype All offspring in the initial F1 generation will have the same genotype, Gg, and the same phenotype with the dominant trait. This occurs because the offspring receive one allele from each parent, a G from one parent and a g from the other parent.

Detailed explanation-3: -An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB.

Detailed explanation-4: -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.