00:01
We're looking at humans and chimpanzees.
00:03
Which genetic characteristics do we share? a, we have the same number of chromosomes.
00:09
B, the position of a centromere on human chromosome 2 matches the position of a centromat on the chimp chromosome.
00:15
C, in both cases, chromosome 2 is a fusion of ancestral chromosomes.
00:20
D, centromeres on all the chromosomes fall within inverted chromosome segments or all of the above.
00:26
So this question is basically about the history of the human chromosome 2.
00:31
So it's about human chromosome 2 because it's interesting.
00:38
So in the distant past, a common ancestor of all the great apes seems to have had two chromosomes, and in humans only these fused into chromosome 2.
00:52
So it's not c because chimpanzees do not show that fusion.
00:56
So if not a, because this means that for sure we have a different to chromosome number...