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Hybrid vigour results from ____________

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Hybrid vigour results from ____________

(a) dominance

(b) co-dominance

(c) over dominance

(d) incomplete dominance

I had been asked this question during a job interview.

My query is from Genes, Chromosomes and Genomes in section Bioenergetics, Enzymes, Metabolism, Genes, Chromosomes and Genomes of Cell Biology

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Correct choice is (c) over dominance

Easiest explanation: In case of dominance, the expression of dominant allele masks the expression of recessive allele. In co-dominance, both the alleles are equally expressed. In over dominance, the combination of genotypes from two different parents leads to supplementing the effect of each other and thus the effects lead to increased vigour.

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