2Heterozygous vs Homozygous Pairs of alleles can be either heterozygous or Homozygous.An allele are a pair of genes (section of DNA).
3HeterozygousHeterozygous means that there are two different alleles, one being dominate and the other is recessive.This is represented by lettersFor example: Rr, Gg, TtThe capital means dominate gene, while the lower case means recessive.
4Homozygous Means that both alleles are exactly the same. For example: FF, GG, TT
5Dominate and recessive A dominate allele will always be expressed over a recessive allele.For Example:Brown eyes are dominant to blue eyes, thus brown eyes are given the letter B, as blue eyes are given the letter b. If a person has the alleles Bb, they will have brown eyes, BB they will have brown eyes, bb they will have blue eyes.