A monohybrid cross between two plants, one having 22 cm long internodes and the other having 12 cm long internodes, produced $F_{1}$ hybrids all of 18 cm long internodes. This is a case of

incomplete dominance

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complete dominance

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multiple allelism

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recessive dominants

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Solution

The correct option is A incomplete dominance
Incomplete dominance is a form of intermediate inheritance in which one allele for a specific trait is not completely expressed over its paired allele. This results in a third phenotype in which the expressed physical trait is a combination of the phenotypes of both alleles.

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A monohybrid cross between two plants, one having 22 cm long internodes and the other having 12 cm long internodes, produced F1 hybrids all of 18 cm long internodes. This is a case of

A monohybrid cross between two plants, one having 22 cm long internodes and the other having 12 cm long internodes, produced $F_{1}$ hybrids all of 18 cm long internodes. This is a case of