How do you know whether something is homozygous dominant or heterozygous dominant?

Answer 1

We can know whether the gene is homozygous or heterozygous dominant.
by law of dominance:the character which is express in f1 generation is dominant one. Male dominant FEMALE
TT tt –reccessive

Meosis

T t

Tt-----------------------F1 presence of two different types of gene s show the offspring is heterozygous