There are the two cases of individuals (Chinese guy and a Turkish gal) who have 22 sets of chromosomes. The Chinese guy story has been around for eight years...I think the Turk lady story about four years. Neither of the two will have produce a descent with the 22 sets unless they were introduced and produced off-spring. But you have to ask....how did their parents produce the 22 set kid?
Down’s Syndrome is an example of chromosomal error.
Down’s Syndrome is one of the few shifts where the developing offspring survives even to birth.
Most large-scale genetic ‘mutations’ result in death of the fetus.
Interesting. How were they even targeted and checked for their chromosomes?
Point being, something must have made them stand out from the general population.