10.3 Gene pools and speciation



The great majority of humans and many living things are diploid. This means that they have 1 pair of each chromosome, one from each parent. However there are organisms that have more than 2 pairs, they may have 3, 4 or more pairs of chromosomes. Many plants and some animals display these genetic chromosomal characteristics. Many polyploids display new variation compared to their parental species. This may be a variation of structure, size or shape (morphology) if these variations also lead to reproductive barriers and selective advantage this may lead to the formation of new species.



HL Topic 10 Genetics Copyright © by Alex Black. All Rights Reserved.

Share This Book