ReNEET 2026 · Biology · Q175Principles of Inheritance and VariationIn our bank: Concept match · 78%
Assertion A: In an experiment, Mendel observed that the F1 progeny plants are all tall and none are dwarf. Reason R: Stem height is a contrasting trait, with tall being dominant and dwarf being recessive. Choose the most appropriate answer:
- A.Both A and R are correct and R is the correct explanation of A✓
- B.Both A and R are correct but R is not the correct explanation of A
- C.A is correct but R is not correct
- D.A is not correct but R is correct
Correct Answer
(A) Both A and R are correct and R is the correct explanation of A
Solution & Explanation
When Mendel crossed pure tall and pure dwarf pea plants, all F1 plants were tall (Assertion correct). This is precisely because the tall allele (T) is dominant and masks the recessive dwarf allele (t) in the heterozygous F1 (Reason correct and the explanation of the observation).
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