And their role in traits and behaviors and also how genes are passed on from generation to generation, how they are expressed, how combinations factor into it, etc.. Our understanding of genetics is continuously evolving. A decade ago, some scientists were claiming that red hair would be extinct in 50 years, recently that prediction has been proven false.
But I do agree that there has been an eagerness on the left to find the "gay gene" holy grail to back up the "born this way" idea. My view, as written below, is who cares?