Question

When a cross is made between a tall plant with round seeds (TtRr) and tall plant with wrinkled seed (Ttrr), the proportions of phenotype in the offspring could be expected to be tall and wrinkled is

• A. $\frac{3}{8}$
• B. $\frac{1}{4}$
• C. $\frac{1}{2}$
• D. $\frac{3}{4}$

Answer 1

The correct option is A $\frac{3}{8}$

TtRr parent would make TR, Tr, tR, tr gametes

Ttrr parent would make Tr, tr gametes.

The cross would result in 8 offsprings, in which 3 offspring with TTrr, Ttrr, Ttrr would have a tall and wrinkled phenotype.

Hence, the correct answer is '3/8'.