A cross between two tall garden pea plants produced all tall plants. The possible genotypes of the parents are
I) TT, TT
II) TT, Tt
III) Tt, tt
IV) Tt, Tt

III, IV

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I, IV

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I, II

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II, III

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Solution

The correct option is C I, II
If the offsprings produced are all tall plants, then the possible genotypes will be:
1. TT x TT (which will result in all tall plants with genotype TT)
2. TT x Tt (which will result in tall plants with genotype TT (3 plants) and one with genotype Tt (which will also be phenotypically tall).
Thus, the correct answer is option (C).

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Which of the following inferences can be drawn from the given information?
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(iv) Mutation may have occurred in a gene producing an enzyme.

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A cross between two tall garden pea plants produced all tall plants. The possible genotypes of the parents are I) TT, TT II) TT, Tt III) Tt, tt IV) Tt, Tt

A cross between two tall garden pea plants produced all tall plants. The possible genotypes of the parents are
I) TT, TT
II) TT, Tt
III) Tt, tt
IV) Tt, Tt