Question

A pea plant with purple flowers were crossed with white flowers producing 40 plants with only purple flowers .on selfing , these plants produced 470 plants with purple flowers and 162 with white flowers. what genetic mechanism account for these results

Answer 1

the purple flowers are dominant in nature and white flowers are recessive,thus mechanism is f1 generation the ratio is 3:1
in next case in self the dominant can be varied as 1:2and recessive is 1 so the ratio is 1:2:1.thus f2 generation.in first case recessive had been hidden by dominant