codominance

(noun)

a condition in which both alleles of a gene pair in a heterozygote are fully expressed, with neither one being dominant or recessive to the other

Related Terms

  • incomplete dominance
  • allele

Examples of codominance in the following topics:

  • Alternatives to Dominance and Recessiveness

    • With the inclusion of incomplete dominance, codominance, multiple alleles, and mutant alleles, the inheritance of traits is complex process.
    • A variation on incomplete dominance is codominance, in which both alleles for the same characteristic are simultaneously expressed in the heterozygote.
    • An example of codominance is the MN blood groups of humans.
    • In a self-cross between heterozygotes expressing a codominant trait, the three possible offspring genotypes are phenotypically distinct.
    • Discuss incomplete dominance, codominance, and multiple alleles as alternatives to dominance and recessiveness
  • Mendel's Law of Dominance

    • One allele can be dominant to a second allele, recessive to a third allele, and codominant to a fourth.
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