The progeny of a tall plant having round seeds crossed with short plants having wrinkled seeds are tall plants having round seeds. This is because 'tallness' and round shape of seeds are dominant traits on the other hand, 'shortness' and 'wrinkled shape' of seeds are recessive traits. When F1 progeny are crossbred by self-pollination then we will have traits like parents and the other two will have new combinations of traits. Thus,
(1) Some F2 progeny will be tall plants with round seeds (9)
(2) Some F2 progeny will be tall plants with wrinkled seeds (3)
(3) Some F1 progeny will be short plants with round seeds (3)
(4) Some F1 progeny will be short plants with wrinkled seeds (1).