In codominance,the phenotypic ratio is......

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(A) In codominance,both alleles of a gene pair express themselves equally in the $F_1$ generation.This means that the heterozygote shows the character

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$1:2:1$

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(A) In codominance,both alleles of a gene pair express themselves equally in the $F_1$ generation.This means that the heterozygote shows the characteristics of both parents simultaneously.For a monohybrid cross involving codominance (e.g.,$AB$ blood group or coat color in cattle),the genotypic ratio is $1:2:1$ (homozygous dominant : heterozygous : homozygous recessive).Since the heterozygote expresses both traits distinctly,the phenotypic ratio also becomes $1:2:1$.

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