Plus who wants some unknown genetics? Regardless of our ability to test for some basic genetic health issues prior to adoption there can still be mental problems with the adopted kid that aren't able to be tested for and then you are stuck with someone else's genetic problems, perhaps the reason they let the kid be put up for adoption in the first place.  Thanks but no thanks...there's a reason most of those kids are given up, some known but many unknown and who wants to be part of that?