B
buffalo
Guest
Incorrect - there are several other ways.ROTFL!
How do you explain the fact that human beings and Chimpanzees have retrovirus sequences in analogus locations?
The only way that can be explained is by a chromosome fusion and common ancestry. Retrovirus infections are not part of the so called “design” of the human or chimpanzee genomes.
Multiple infections
Virus that target specific areas of the genome. Common design shows that animals can have similar areas that are the same.
HGT
From Nature:
“Against this background, it was surprising to find that the chimpanzee genome has two active retroviral elements (PtERV1 and PtERV2) that are unlike any older elements in either genome; these must have been introduced by infection of the chimpanzee germ line. The smaller family (PtERV2) has only a few dozen copies, which nonetheless represent multiple (5–8) invasions, because the sequence differences among reconstructed subfamilies are too great (8%) to have arisen by mutation since divergence from human. It is closely related to a baboon endogenous retrovirus (BaEV, 88% ORF2 product identity) and a feline endogenous virus (ECE-1, 86% ORF2 product identity). The larger family (PtERV1) is more homogeneous and has over 200 copies. Whereas older ERVs, like HERV-K, are primarily represented by solo LTRs resulting from LTR–LTR recombination, more than half of the PtERV1 copies are still full length, probably reflecting the young age of the elements. PtERV1-like elements are present in the rhesus monkey, olive baboon and African great apes but not in human, orang-utan or gibbon, suggesting separate germline invasions in these species.”
Snake DNA has been found in a cow. Should we conclude common ancestry?