In a cross between a tall pea with yellow seeds (DdYy) and a tall plant with green seeds (Ddyy), what proportion of the offsprings could be expected to be : a) Tall and green, b) Dwarf and green?

Let us draw a cross for the above question. 

     

In the above cross it is seen that 

a)  1/3 offsprings may be Tall and Green

b) 1/6 off springs may be dwarf and green