Question

Complete the Punnett squares for Mendel‘s cross (F1- first filial) of a hybrid Tall Plant (Tt) with a hybrid Tall Plant (Tt). Provide the genotypes and phenotypes of the offspring

Answer 1

In this case, we have a cross between hybrids Tt xTt so the cross is as follows

Punnet square

$\begin{bmatrix}{\placeholder{⬚}} & {T} & {t} \\ {T} & {TT} & {Tt} \\ {t} & {Tt} & {tt}\end{bmatrix}$

Now we obtain frequencies

Genotypic

Tall Homozygous: TT = 1/4 = 25%

Tall Heterozygous: Tt = 2/4 = 50%

Short Homozygous: tt = 1/4 = 25%

Phenotypic

Tall: 3/4 = 75%

Short: 1/4 = 25%