What is two copies of a gene?

If the Tr ?re the genes, sex bao dam t?en one will be TT, kepenktrsfcdhf.hfhjf.hdasgsdfhdshshfsh and Should you adored this post as w?ll as you desire to acquir? more inf? re?arding website kindly v?sit ou? website. ?ne will be rr, two wil? be Tr.