Quote:
Originally Posted by Neapolitan
Like during the first stage of the experiment when the heavier yeast fell to the bottom presumably they were bi-cellular, was this an actual mutation taken place or alleles?
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A mutation results in the formation of a new allele of a gene that is already present. So any new genes that form and support multicellular yeast are alleles of genes that were present in the single cellular ones...they just now have a new function.