Q1. [2]
List any two pairs of visible contrasting characters of garden pea plants used by Mendel for his experiments stating the dominant and recessive characters in each pair.
Previously asked in CBSE board exam
2024 31/3/1 Q23(a)
Generated by claude-sonnet-4-6 · 2026-06-15 06:54 · grounding rag
Model Answer
Pair 1: Plant Height
- Dominant character: Tall plant
- Recessive character: Short plant
Pair 2: Seed Shape
- Dominant character: Round seeds
- Recessive character: Wrinkled seeds
(Any other valid pair such as Flower Colour — Violet (dominant) / White (recessive) is also acceptable.)
Source: Chapter 8, Section 8.2.2
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Explanation
- The question asks for two pairs, each with the dominant and recessive character clearly named — that's 1 mark per pair.
- Mendel's seven pairs include: tall/short, round/wrinkled seeds, violet/white flowers, yellow/green seeds, etc. State any two.
- Always write which is dominant and which is recessive explicitly — don't just list them, or you may lose marks.
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