The key takeway is easily lost: "genetics seemed to account for between 8 and 25 percent of the behavior. The rest was presumably a result of environmental or

The key takeway is easily lost: "genetics seemed to account for between 8 and 25 percent of the behavior. The rest was presumably a result of environmental or other biological influences. " There is a lot of other research which identify these "other biological influences" as hormonal imbalance during the pregnacy, which in most severe cases causes a child to be transgender, in milder ones gay (this kind of explains "drag queens", gay man who identify as male, but still like to dress up as women sometimes. Not sure if there's a female counterpart to this phenomenon).