If pea plants with round and green seeds (RRyy) are crossed with pea plants having wrinkled and yellow seeds…

Question

If pea plants with round and green seeds (RRyy) are crossed with pea plants having wrinkled and yellow seeds (rrYY), the seeds developed by the plants of F₁ generation will be :

Accepted Answer

## Model Answer **(C) 100% round and yellow** When RRyy × rrYY are crossed, all F₁ offspring are RrYy — round (R dominant over r) and yellow (Y dominant over y). ## Explanation From the textbook (Fig. 8.4, chapter 8): RRyy (round, green) × rrYY (wrinkled, yellow) → all F₁ = RrYy. Round (R) is dominant over wrinkled (r), and yellow (Y) is dominant over green (y), so 100% of F₁ seeds are round and yellow. Examiners expect you to recall dominant-recessive relationships and the F₁ genotype directly.

Science — CBSE Class 10 board question