Definition of Incomplete Dominance

Incomplete dominance is an inheritance pattern in which a heterozygotic individual that is carrying two different alleles exhibit such a phenotype that is a mixture of intermediate of the two corresponding individuals which are homozygous. Take an example of two rose plants which are homozygotes and have a red and white color. The red color is due to the dominant allele and vice versa.


But the heterozygotic rose plant which is composed of both alleles shows pink color. Incomplete dominance happens when the dominant allele does not mask the effect of the recessive allele completely and the resulting offspring exhibits the blending of both alleles. This phenomenon is also known as partial dominance or semi dominance.


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