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August 02, 2025, 02:23:26 am
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Author Topic: Codominance and Incomplete dominance  (Read 1109 times)  Share 

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Nialllovespie

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Codominance and Incomplete dominance
« on: July 30, 2017, 12:21:36 pm »
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Hey!

Is anyone able to explain the difference between codominance and Incomplete dominance?

I'm so confused!!

Thanks!!

Nia :)
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Opengangs

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Re: Codominance and Incomplete dominance
« Reply #1 on: July 30, 2017, 12:34:59 pm »
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Nice question!

Codominance refers to when two alleles are dominantly expressed. So, both alleles will be fully expressed.
In humans, codominance occurs with ABO blood groups. Since the A and B alleles are both dominant, a third genotype may be expressed, namely AB. This is because the dominance of both A and B will BOTH be completely expressed.

Incomplete dominance is kind of like its polar opposite. Neither of the two alleles are fully expressed, so the third genotype will be a blend of the two. For example, the snapdragon is homozygous for red and white flowers. When the red and white are crossed, neither are fully expressed resulting in a blend of the two.

Hopefully, this helps!
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