3 Matching Annotations
  1. Mar 2025
  2. bio.libretexts.org bio.libretexts.org
    6.5: Types of Dominance
    3
    1. Anagh_Upadhyay 17 Mar 2025
      Co-dominance is another type of allelic relationship in which a heterozygous individual expresses the phenotype of both alleles simultaneously. An example of co-dominance is found within the ABO blood group of humans.

      Another example of co-dominance is a speckled chicken. The genotype of a speckled chicken contains two alleles- B(black) and W(white). Black is expressed BB and white as WW. When put on a Punnett Square, the result is 100% BW. There is no dominant or recessive trait, instead both are equally visible.

    2. Anagh_Upadhyay 17 Mar 2025
      In incomplete dominance (also called semi-dominance), both alleles affect the trait additively, and the phenotype of the heterozygote shows a typically intermediate between the homozygotes, which is often referred to as blended phenotype.

      In incomplete dominance, the dominant trait is not fully expressed while the recessive trait is around.

    3. Anagh_Upadhyay 17 Mar 2025
      As we will now see, there are two other types of Dominance — namely, incomplete dominance and co-dominance.

      There are two types of dominance- incomplete dominance and co-dominance. They come under non-mendellian genetics.

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    bio.libretexts.org/Bookshelves/Genetics/Introduction_to_Genetics_(Singh)/06:_Alleles_at_a_Single_Locus/6.05:_Types_of_Dominance