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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Krishan k jakhad
Polygenic inheritance, also called quantitative inheritance, refers to a single inherited phenotypic trait that is controlled by 2 or more different genes. The traits that are determined by polygenic inheritance are not simply an effect of dominance and recessivity, and do not exhibit complete dominance as in Mendelian Genetics, where one allele dominates or masks another. Instead, polygenic traits exhibit incomplete dominance so... the phenotype displayed in offspring is a mixture of the phenotypes displayed in the parents. Each of the genes that contributes to a polygenic trait, has an equal influence and each of the alleles has an additive effect on the phenotype outcome.... e.g.physical traits that are controlled by polygenic inheritance, such as hair color, height and skin color, as well as the non-visible traits such as blood pressure, intelligence, autism and longevity