Question

In peas, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plants to pure short plants in F₂ generation will be ______.

Options

• 1 : 3

• 3 : 1

• 1 : 1

• 2 : 1

Answer 1

In peas, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plants to pure short plants in F₂ generation will be 1 : 1.

Explanation - 

A cross between (TT) and (tt) would produce progenies with following genotypes - 

In F₂ generation - selfing of F₁ progeny -

Gametes Tt	T	t
T	TT	Tt
t	Tt	tt

Pure tall (TT), Mixed tall (Tt) and Short (tt). The ratio of pure tall and pure short plant is 1 : 1.