I, Donald John Trump, do solemly swear that I will faithfully execute the office of President of the United States and will, to the best of my ability, preserve, protect, and defend the Constitution of the United States. So help me God.
For a guy who spent some time soliciting million-dollar donations from industry to bling up that ceremony, the climax of it doesn't seem to have been as memorable as one might think.
https://en.wikipedia.org/wiki/Evolution_of_sexual_reproduction
Sex has been around for a while and such an elimination hasn't happened, so my guess is that, unless changes in the environment make it a more-prominent negative selection factor, homosexuality isn't going to be eliminated via selection of genes in the near future.