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Question

From a single ear of corn, a farmer planted 200 kernels which produced 140 tall and 40 dwarf plants. The genotype of these offsprings are most likely

A
TT, Tt and tt
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B
TT and tt only
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C
TT and Tt only
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D
Tt and tt only
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Solution

The correct option is A TT, Tt and tt
Mature corn plants produce ears that contain hundreds of seeds or kernels. Each seed is formed by the fertilization of an egg by a male gamete. It has both the allele for height T and t, out of which T allele for the height is the dominant one. So, the offspring produced by the crossing of Tt and Tt will have genotype as TT, Tt and tt which produces 140 tall from TT and Tt gamete and 40 dwarf plants from tt gametes.
So, the correct answer is option A.

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