What is heterozygous allele?

What is heterozygous translation?

What are homozygous alleles?

A man with type A blood group marries a woman who has AB group. We do not know whether the man is homozygous or heterozygous for I^(A) allele. Which one of the following types in the progony of this couplewould indicate that the man is heterozygous?

An individual heterozygous for two alleles (CcDd) produce one million sperms, how many of the sperms will have both dominant alleles?

What is allele?

What is allele?