How are alleles designated?

Answer 1

Alleles are typically designated using letters, with the dominant allele being represented by a capital letter and the recessive allele being represented by a lowercase letter. For example, in a gene where the dominant allele is represented by "A" and the recessive allele is represented by "a", an individual can have one of three genotypes: "AA" (homozygous dominant), "Aa" (heterozygous), or "aa" (homozygous recessive).