The genotype of the F1 progeny of a cross between a tall pea plant (TT) and a short pea plant (tt) is:

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Solution

Cross between TT and tt:
Gametes T T
t Tt Tt
t Tt Tt
The genotype of the F1 progeny of a cross between a tall pea plant (TT) and a short pea plant (tt) is 'Tt'.

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Question 3
A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because

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The genotype of the F1 progeny of a cross between a tall pea plant (TT) and a short pea plant (tt) is:

Cross between TT and tt: GametesT T tTt Tt tTt Tt The genotype of the F1 progeny of a cross between a tall pea plant (TT) and a short pea plant (tt) is 'Tt'.

Cross between TT and tt:
Gametes T T
t Tt Tt
t Tt Tt
The genotype of the F1 progeny of a cross between a tall pea plant (TT) and a short pea plant (tt) is 'Tt'.