lol nuh - its the amino acid sequencing in all animals - and they count how many diffs are between each organism - say with humans and chimpanzees, the difference would be small, say 2? but with humans and a pea plant - itd be like....40 lol
dun think it has much to do with blood..
just a note of interest, according to our deputy principal, if a student from my school (baulkham hills high) gets around average for their courses, they will get a UAI of usually at least 97