|MadSci Network: Evolution|
how can a mutation provide an animal with an extra set of chromosomes? and, secondarily: if specie with different numbers of chromosomes can't intermingle, how could an individual that ended up with an extra set of chromosomes reproduce? i am assuming we are dealing with a sexually-reproducing animal here, because a plant would provide us with the possibility of self-pollination, and an asexual organism wouldn't need a counterpart to reproduce. also, if this would depend on two individuals gaining an extra set of chromosomes at the same time and mating with each other, then how likely is this to occur? obviously, at some time in the past, something of the sort has happened, for there to exist the variety of specie we have. life didn't start at 46 cchromosomes.
Re: How can genetic mutations change the n chromosome number of a species?
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