Punnett squares can be used to predict the two possible outcomes of the botanist’s test cross. the punnett square on the left shows the predicted result if the unknown plant is homozygous (gg); the punnett square on the right shows the predicted result if the unknown plant is heterozygous (gg).

A punnet square can be described as a diagram which shows the probabilities of the expected genotypes of offsprings from a cross.

The punnet square for the above mentioned question are shown below.

A cross between a homozygous dominant and homozygous recessive pod plant shows that the children will be heterozygous for the green pod trait.

A cross between a heterozygous green pod plant and a homozygous recessive pod plant shows that 50% of the plants will be heterozygous green pods and 50% will be recessive pods.

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