Question

1. if a dominant allele for tallness is expressed as t and a recessive allele for shortness is expressed as t, what is the genotype represented as tt?

homozygous dominant
homozygous recessive
heterozygous recessive
heterozygous dominant

Explanation:

In genetics, homozygous means having two identical alleles. Since 't' is the recessive allele for shortness and the genotype is 'tt' (two identical recessive alleles), it is homozygous recessive. There is no such thing as heterozygous recessive or heterozygous dominant as heterozygous means having two different alleles. Homozygous dominant would be 'TT'.

Answer:

homozygous recessive