Answer :
That may be homozygous dominant or homozygous recessive, and it can be either AA or aa. A person who possesses two dominant "A" alleles for a specific gene is said to be homozygous for that gene. One who possesses two recessive "a" alleles and is homozygous for them will have the genotype "aa."
One of two types of organisms can exist: homozygous recessive (TT) or homozygous dominant (TT) ( tt ). Heterozygous denotes that an organism possesses both alleles (Tt) of a particular gene (hetero- means different).
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