Question

A male plant bearing red flowers was crossed with a female plant bearing yellow flowers. In the F₁ generation, all the flowers were orange in colour.

Mention the ratio of red flowers, yellow flowers and orange flowers in the F₂ generation.

Answer 1

When heterozygous orange flowers from the F₁ generation interbreed, the F₂ generation displayed pure parental features. Instead of the conventional 3:1, the Mendelian ratio becomes

	R	y
R	RR Red	Ry Orenge
y	Ry Orenge	yy yellow

1 (Red flower) : 2 (Orange flower) : 1 (Yellow flower)