"Proponents of the homosexual lifestyle argue that as race is merely a byproduct of inherited genes, so is homosexuality. The weakness of this position is that people of color reproduce and pass on the DNA that makes the skin brown; however, homosexuals cannot reproduce. If homosexuality is a genetic trait and homosexuals were true to their orientation, the trait would have virtually disappeared over the ages. Nature does not perpetuate homosexuality."

Skin color is determined by the amount and type of the pigment melanin in the skin. Melanin comes in two types: phaeomelanin (red to yellow) and eumelanin (dark brown to black). Both amount and type are determined by four to six genes which operate under incomplete dominance. One copy of each of those genes is inherited from the father and one from the mother. Each gene comes in several alleles, resulting in a great variety of different skin colors.

Most scientists agree that it is unlikely that there is a single 'gay gene' that determines something as complex as sexual orientation, and that it is more likely to be the result of a collection of factors, some of which may be genetic.