text: how would you find out exactly what genes you have. such as if i have homozygous or heterozygous blonde hair? we learned about dna and genes in biology a few weeks ago and i just wondered if there was a way to find out what my genes are. (homozygous - aa or aa, heterozygous - aa, just in case you didnt know) there are only 2 situations where you can tell:  1) if you have a recessive characteristic.  the genes for that one would have to be homozygous.  2) if you have a dominant characteristic and one of your parents has the recessive version of the same characteristic.  then you must be heterozygous for that one.