Q.Two plants A with white flowers and B with red flowers were crossed. The Ft-progeny shows all red flowers and F2 has three red and one white. Categorise the trait as dominant and recessive.
Ans. In F1, all the plants have red coloured flowers and in F2 the ratio of red : white is that of 3 : 1.
The dominant trait is red colour of flowers.
The recessive trait is white colour of flowers.