Question

When round and yellow seeded pea plants (YYRR) are crossed with green wrinkled

(y y r r) seeded pea plants the F1 are yellow and round seeded plants (Yy Rr).

What will be the results when this F1 is crossed with round and yellow seeded parents? 

Answer 1

YyRr × YYRR

↓

As we can see from the Punnett square, when a heterozygote is crossed with a dominant homozygote, all offspring in F2 will have yellow and round seeds.