A permanent change in the number of chromosome sets found in living cells.  Once this change has occurred, it can be passed on when an organism breeds.  The occurrence of polyploidy is a mechanism of speciation.  Polyploids are most commonly found in plants and crops, but can also be found in certain groups of fish and amphibians.


apples, bananas, watermelon, goldfish, salmon, salamanders


Autopolyploidy-  chromosome doubling within a species.

Allopolyploidy-  hybridization, followed by chromosome doubling.

Woodhouse, M., Burkart-Waco, D. & Comai, L. (2009) Polyploidy. Nature Education 2(1):1

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.