More than half of your body is not human ... The human genome - the full set of genetic instructions for a human being - is made up of 20,000 instructions called genes. But add all the genes ...

DNA extracted from bone fragments found in the ... "Out of this very little number we find one individual that has half-and-half mixed ancestry, " Dr Slon told BBC News. When other studies are ...

Afterward, only half of the new DNA double helices would be hybrids; the other half would be completely new. Every subsequent round of replication therefore would result in fewer hybrids and more ...