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A-Level Biology OCR A

Hybridisation Polyploidy Genes Describe Role Process Speciation Plants

Hybridization and polyploidy contribute to plant speciation by creating reproductive isolation and increasing genetic variation, with polyploidy allowing for new functions to develop without losing original ones.

L'hybridation et la polyploïdie favorisent la spéciation chez les plantes en créant une isolation reproductive et en introduisant une variation génétique accrue, la polyploïdie permettant le développement de nouvelles fonctions sans perte des fonctions originales.

Front Describe the role of hybridisation and polyploidy in process of speciation in plants.
Back Hydbridisation and polyploidy:
  • Hybrids formed in hybridisation are reproductively isolated from each parent speceis that ould still be present in the same habitat
  • In the hybrids, recombination leads to more genetic variation & mixing of different genes
  • In polyploidy (having more than 2 sets of chromosomes), multiple copies of genes make it possible for new functions to develop through mutation, without loss of original function

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