Biased fractionation: the process of fractionation of gene content following whole genome duplications where one homeologous chromosome is targeted for more gene loss events than the partner chromosome(s).
Please see these papers:
- Following tetraploidy in an Arabidopsis ancestor, genes were removed preferentially from one homeolog leaving clusters enriched in dose-sensitive genes
- Differentiation of the maize subgenomes by genome dominance and both ancient and ongoing gene loss
- A model for biased fractionation after whole genome duplication
- The genome of the mesopolyploid crop species Brassica rapa