bambu;5874951 said:The genetic overdominance hypothesis states that some combinations of alleles (which can be obtained by crossing two inbred strains) are especially advantageous when paired in a heterozygous individual. This hypothesis is commonly invoked to explain the persistence of some alleles (most famously the Sickle cell trait allele) that are harmful in homozygotes.......
No homo.....
Does not prove your point all humans are of the same species. we can not make hybrids
lion&tiger makes liger
donkey &horse makes mule
white human & black human still only makes human no hybrid is created.