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.
• B. F2 generation has 4 homozygous, 4 double heterozygous and 8 intermediates.
• C. F2 generation has all dominant forms of morphological characters.
• D. F2 generation has all recessive forms of morphological characters.

Answer 1

Answer: (B)

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".