SAQ : What will be the phenotypic ratio of round seed to wrinkled seed in F₁ generation if we crossed a pure round seeded pea plant with pure wrinkled seeded pea plant and in F₁ generation only round seeded pea plant comes into sight?

Question

What will be the phenotypic ratio of round seed to wrinkled seed in F_₁ generation if we crossed a pure round seeded pea plant with pure wrinkled seeded pea plant and in F_₁ generation only round seeded pea plant comes into sight?

Answer

If only round seeded pea plants come into sight in the F₁ generation, it means that the round seed trait is dominant over the wrinkled seed trait. This can only happen if the pure round seeded pea plant is homozygous dominant (RR) and the pure wrinkled seeded pea plant is homozygous recessive (rr).