(H=human, C=chimp, G=gorilla, O=orangutan)
"Long long ago, in a laboratory far far away, scientists
figured out that chimpanzees have 24 chromosomes in
their sperms and eggs, whereas humans only have 23.
Therefore, these great scientists theorized that two of
our chromosomes might have fused together sometime in
the recent past (aka millions of years ago).
Their theory made 3 predictions:
(1) One of our chromosomes would look like two of the
chimp chromosomes stuck together.
(2) This same chromosome would have an extra sequence in
it that looked like a centromere. Centromeres are the
things in the middle that microtubules grab onto to
divide a pair of chromosomes during mitosis.
(3) It would also have telomeres (ends) but in the middle
- and they would be in reverse order. Sort of like this:
See the "DNEEND" in the middle? That's what two
telomeres would look like if two chromosomes were stuck
As you might have guessed, all three predictions have been
verified. While, as always, it's impossible to prove that an
all-powerful being didn't create the evidence to trick us,
the reasonable explanation is that humans and chimps share a
For a more detailed analysis, see Comparison of the
Human and Great Ape Chromosomes as Evidence for Common Ancestry.
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