How do you prove if something is heterozygous?

Answer 1

The carrier must be Homozygous because if he were hetero it must be Hh and the dominant gene is expressed but homozygous gives them the possibility of hh (only a carrier) or HH (definitely a carrier)

Don't totally understand the previous answer; however, I understand the question to mean that you want to know if you are homozygous or heterozygous for a certain trait.

If you express a recessive phenotype, that is you have blue eyes for example, you are definitely homozygous for that trait. If one of your parents has a recessive trait, like blue eyes, and the other parent expresses a dominant trait, like brown eyes, AND if you have brown eyes, you can be sure that you are heterozygous.

Otherwise it is impossible to tell until you have children. Then you can work backwards from you and your spouse, look at their parents and your parents and then figure the only possible way all those conditions could exist is if you are heterozygous or if you are homozygous for that trait.

Answer 2

To prove if something is heterozygous, you would need to examine its genetic makeup. In genetics, heterozygous refers to having two different alleles for a particular gene. To confirm heterozygosity, you would need to analyze the DNA of the organism in question and identify the presence of different alleles at the specific gene locus being studied.

Answer 3

Homozygous - aa AA

Heterozygoes - Aa

Answer 4

You are not giving enough information to solve this. But, in practice, further crosses will give some clue if the same results occur. If that happens, then the parent in homozygous dominant.