Match List-I with List-II
| List-I | List-II |
|---|---|
| Features | Selection traits/term |
| (A) Peak gets higher and narrower | (I) Directional |
| (B) Peak shifts in one direction | (II) Disruptive |
| (C) The gene pool remains constant | (III) Genetic equilibrium |
| (D) Two peaks form | (IV) Stabilising |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A) - (IV), (B) - (I), (C) - (III), (D) - (II)
(A) Peak gets higher and narrower — this matches (IV) Stabilising. In stabilising selection more individuals have the mean character value, and both extremes are removed. The curve becomes taller and narrower around the mean.
(B) Peak shifts in one direction — this matches (I) Directional. In directional selection more individuals acquire a value other than the mean, at one end of the range. The whole peak moves towards that end.
(C) The gene pool remains constant — this matches (III) Genetic equilibrium. When no factor changes the allele frequencies, the gene pool stays the same from generation to generation. This is the Hardy-Weinberg equilibrium.
(D) Two peaks form — this matches (II) Disruptive. In disruptive selection more individuals acquire the values at both ends of the range, and fewer stay near the mean. The single peak splits into two.