HSC Stuff > HSC Biology

Codominance and Incomplete dominance

(1/1)

Nialllovespie:
Hey!

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

I'm so confused!!

Thanks!!

Nia :)

Opengangs:
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!

Navigation

[0] Message Index