Uploaded March 2025 | Updated September 2026, 10 hours ago

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In this video we look at codominant alleles. First we explore what is meant by codominant alleles, using snapdragons as an example. We then look at how codominant alleles are inherited and how to work out the phenotype of the offspring.

Image credits:

Mendel pea traits
commons.wikimedia.org/wiki/File:Mendel_pea_traits.svg
Nefronus, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons

White snapdragon
commons.wikimedia.org/wiki/File:Snapdragon_--_Antirrhinum_majus.jpg
Jim Evans, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons

Red snapdragon
commons.wikimedia.org/wiki/File:Antirrhinum_Crown_Red_0zz.jpg
Photo by David J. Stang, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons

Pink Snapdragon
commons.wikimedia.org/wiki/File:Pink_Antirrhinum_majus.jpg
Samir Dalui, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons