If an allele is dominant, one dominant allele is enough to express the dominant trait in the offspring. The allele which is expressed is known as the dominant allele while the allele which is subjected to suppression is known as a recessive allele of the gene. Dominance is a type of allele interaction in the heterozygous state, in which one allele of a gene if fully expressed and the effect of the second allele is masked, resulting in a phenotype which expresses the dominant trait. A gene is known to have two alleles: a dominant allele and a recessive allele.
Side by Side Comparison – Dominance vs Codominanceĭominance is the key concept used by Gregor Mendel to explain the theory of inheritance. The key difference between dominance and codominance is that dominance is the masking effect of one allele over the other allele when the gene is in heterozygous state while the codominance is expressing the effects of both alleles independently without blending in heterozygous state.Ĥ. Dominance and codominance are relationships of the alleles of the genes when expressing the phenotypes. Mendel explained that genes have a pair of alleles and an offspring receives one allele from the mother, and the other allele from the father and the traits are passed from one generation to the next generation. The concept of dominance was introduced by Gregor Mendel in 1865 after performing eight years of experiments with pea plants.
Key Difference – Dominance vs Codominance