Question

1. explain the difference between a homozygous recessive genotype and a heterozygous genotype.

Explanation:

A homozygous recessive genotype has two identical recessive alleles (e.g., aa) for a gene, so the recessive trait is expressed. A heterozygous genotype has one dominant and one recessive allele (e.g., Aa), where the dominant trait is expressed, and the recessive allele is carried but not shown.

Answer:

A homozygous recessive genotype consists of two identical recessive alleles for a given gene (e.g., aa), resulting in the expression of the recessive phenotype. A heterozygous genotype consists of one dominant and one recessive allele for a given gene (e.g., Aa), where the dominant allele's phenotype is expressed, and the recessive allele is present but not phenotypically visible.