Lesson 6: Codominant Alleles

Codominance

  • If both alleles are dominant, it is called codominance.
  • Codominant alleles are both expressed in a heterozygote.
  • The resulting characteristic is due to both alleles being expressed.
  • An example of this is blood groups.

 

Blood Groups

Multiple Alleles | Biology for Non-Majors I

  • An example of this is the AB blood group.
  • It is the result of codominance of A and B dominant alleles.