The genotypic ratio of a monohybrid cross in | vedclass

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(B) In a monohybrid cross,Mendel crossed true-breeding tall plants $(TT)$ with true-breeding dwarf plants $(tt)$.The $F_{1}$-generation consists of al

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$1: 2: 1$

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(B) In a monohybrid cross,Mendel crossed true-breeding tall plants $(TT)$ with true-breeding dwarf plants $(tt)$.The $F_{1}$-generation consists of all heterozygous tall plants $(Tt)$.When $F_{1}$ plants are self-pollinated to produce the $F_{2}$-generation,the Punnett square yields the following genotypes: $TT$,$Tt$,$Tt$,and $tt$.Thus,the genotypic ratio is $1 (TT) : 2 (Tt) : 1 (tt)$,which is $1: 2: 1$.

The genotypic ratio of a monohybrid cross in $F_{2}$-generation is

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