Single Choice

A cross between two tall plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?

ATT and Tt
BTt and Tt
Correct Answer
CTT and TT
DTt and tt

Solution

(b) Tt and Tt Explanation: In the case of TT and Tt; all offspring would be tall (TT, Tt). In the case of option ‘c’ no gene for a dwarf is present, so all offspring will be tall. In the case of option 'd’, one of the parent plants is dwarf, so it is incorrect. In the case of option ‘b’, most of the offspring will be tall and a few will be a dwarf (TT, Tt, tt). Option ‘b’ is the correct answer.

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