If we are bound and determined to debate genetics, yet another analogy is that of the sickle cell. It confers resistance to malaria.
Sin has roots in events that are pre-conception. We should be very careful. There are genes for susceptibility to alcohol abuse. We do not tell such people that it is just fine to get soused.
I was merely pointing out that the article is flawed science.
Every human being is born with desires and tendencies that must be curbed if that person is to live peacefully with his fellow humans. We all have desires to sin and we must daily fight those desires. Homosexuals are no different.