(thing) by BioTech Thu Nov 06 2008 at 21:10:55
A genetic error that can happen after meiosis in which a homologous pair of alleles segregate in a 3:1 rather than a 2:2 ratio. This sometimes happens because the DNA polymerase copies one allele twice and fails to copy the other.

From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.

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