General Science question from Laboratory Attendant exam, 2026 by JKSSB
In Mendel's pea plant experiments, which of the following is recessive?
Last updated Jun 18, 2026
Correct Answer:
Option B —
The trait that hides in F, but reappears in F,
Explanation:
Gregor Mendel's laws of inheritance clearly define dominant and recessive traits based on how they behave across generations:
In the F
1
generation: When Mendel crossed two pure-breeding plants with contrasting traits (e.g., Tall × Dwarf), the recessive trait completely disappears (hides). All the hybrid plants display only the dominant trait (Tall).
In the F
2
generation: When these F
1
plants are self-pollinated, the hidden recessive trait reappears in a strict mathematical ratio of roughly 3:1 (3 dominant to 1 recessive).
Why the other options are incorrect:
A) The trait that appears in all F
1
hybrids: This defines a dominant trait, not a recessive one.
C) The trait that increases with each generation: Traits do not automatically increase in frequency across generations just by being dominant or recessive; their proportions follow predictable genetic ratios.
D) The trait that only appears in the parental generation: Recessive traits do not vanish forever; they skip the F
1
generation and reliably show back up in the F
2
generation.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
