Incomplete Dominance and Codominance
Incomplete dominance and codominance are two different types of inheritance that involve the expression of alleles and the resulting phenotypes in organisms. In incomplete dominance, neither allele completely dominates or masks the other allele. Instead, the heterozygous phenotype is an intermediate or blended expression of both alleles. For example, in snapdragons, a red allele and a white allele may result in pink flowers in heterozygous individuals.
In codominance, both alleles are expressed simultaneously in the phenotype. Each allele contributes its own observable trait without blending or compromising with the other. For example, in certain blood types, the A and B alleles are codominant, resulting in individuals with both A and B antigens on their red blood cells.
Incomplete Dominance & Mendel’s Experiment
Incomplete Dominance is a form of intermediate inheritance where neither of the two alleles for a particular trait is completely dominant over the other. In this type of dominance, the heterozygous phenotype is a blend or intermediate between the two homozygous phenotypes. The concept of incomplete dominance emerged as a significant discovery following Gregor Mendel’s initial work in genetics. Incomplete dominance plays an important role in contributing to the diversity and variation of an organism’s traits or characteristics.
Table of Content
- What is Incomplete Dominance?
- Mechanism of Incomplete Dominance
- Concept of Dominance
- Incomplete Dominance and Codominance
- Examples of Incomplete Dominance
- FAQs on Incomplete Dominance