Mendel crossed a round and yellow seeded pea plant with a wrinkled and green seeded pea plant. What did the plants of F_1 generation look like in…

Mendel crossed a round and yellow seeded pea plant with a wrinkled and green seeded pea plant. What did the plants of $\displaystyle \mathrm{F}_{1}$ generation look like in terms of shape and colour of seed ? On self-pollinating $\displaystyle \mathrm{F}_{1}$ generation plants, plants with four types of combinations of characters were seen in $\displaystyle \mathrm{F}_{2}$ generation. Write the combinations along with their ratios.