| allopolyploid | <cell biology, genetics> A hybrid, usually a plant, which is created from two closely-related species and contains one or more extra sets of chromosomes (i.e. If each parent normally has two sets, the hybrid may have four). See: polyploid. (09 Oct 1997) |
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| allopolyploidy | <genetics> Polyploid condition in which the contributing genomes are dissimilar. When the genomes are doubled fertility is restored and the organism is an amphidiploid. Common in plants but not animals. (18 Nov 1997) |