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Question

It is known that among corn plants, a tall plant (T) trait is dominant over dwarf (t), and the coloured kernel (C) trait is dominant is over white (c). Which of the following results represents the outcome of a cross between contrasting dihybrid parents?

A
F2 generation has 5 homozygous and 11 heterozygous individuals.
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B
F2 generation has 4 homozygous, 4 double heterozygous and 8 intermediates.
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C
F2 generation has all dominant forms of morphological characters.
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D
F2 generation has all recessive forms of morphological characters.
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Solution

The correct option is C F2 generation has 4 homozygous, 4 double heterozygous and 8 intermediates.
When a cross is made between Tt & Cc the offsprings obtained are TC, tc, Tc which are in a ration of 1:2:1 respectively .
So, the correct answer is "F2 generation has 4 homozygous, 4 double heterozygous and 8 intermediates".

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