Question

In cattle, when red one is crossed with a white, an intermediate roan coloured offspring is formed in the F₁ generation. When selfing of the F₁ generation was carried, the result obtained was ______

Options

• 1 Red, 2 Roan, 2 White

• 1 Red, 2 Roan, 1 White

• 2 Red, 1 Roan, 1 White

• 1 Red, 1 Roan, 1 White

Answer 1

1 Red, 2 Roan, 1 White

Explanation:

F₂ generation: RW × RW

	R	W
R	RR (red)	RW (roan)
W	RW (roan)	WW (white)

Phenotypic ratio: 1 Red: 2 Roan: 1 White

Genotypic ratio: RR : RW: WW
                            1  :   2  :    1