Types of Dominance Dominance is a phenomenon in which one allele masks the effec

Types of Dominance
Dominance is a phenomenon in which one allele masks the effect of the other. There are three types of dominance: complete dominance, incomplete dominance, and codominance.
Complete Dominance
In complete dominance, the dominant allele completely masks the effect of the recessive allele. An example of complete dominance is seen in pea plants, where the dominant allele for purple flower color masks the recessive allele for white flower color.
Incomplete Dominance
In incomplete dominance, the dominant allele partially masks the effect of the recessive allele. The phenotype of the offspring is an intermediate between the two parents. An example of incomplete dominance is seen in 4 o’clock plants, where crossing red and white flower plants results in offspring with pink flowers.
Codominance
In codominance, both dominant alleles are expressed with equal strength. This results in a phenotype where both traits are visible. An example of codominance is seen in human blood groups, where both the A and B alleles are expressed in the AB blood type.
These types of dominance are exceptions to Mendelism, which is based on complete dominance and does not favor blending of characters.
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