Principle of Inheritance and VariationEasyBloom L3
Question
What is the probability that a cross between a true-breeding pea plant with smooth seeds and a true-breeding pea plant with wrinkled seeds will produce F1 progeny with smooth seeds?
Options
A.1/2
B.1/4
C.0
D.1
Solution
Sol.(d) [Key Concept: Monohybrid Cross — F1 Prediction] Cross: SS (smooth, true-breeding) × ss (wrinkled, true-breeding) → All F1 = Ss (smooth). Since S (smooth) is dominant over s (wrinkled), all F1 offspring will be Ss and will show smooth seeds. Probability = 1 (100%). This is a standard monohybrid cross demonstrating Mendel's Law of Dominance.
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