Correct option is D
The correct answer is (D) (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
Explanation:
• Mutation (A) was coined by Hugo de Vries (III) in 1901 while working on Oenothera lamarckiana to describe sudden heritable changes.
• Gene (B) was coined by Wilhelm Ludwig Johannsen (IV) in 1909 to replace the terminology 'factors' used by Mendel.
• Chromosome (C) was coined by W. Waldeyer (I) in 1888 to describe the thread-like structures in the nucleus that stain deeply.
• Polygenes (D) was coined by K. Mather (II) in 1941 to describe a group of genes that together control a quantitative trait.
Information Booster:
• Hugo de Vries is also known for the Mutation Theory of Evolution.
• Johannsen also coined the terms 'genotype' and 'phenotype'.
• Waldeyer's term 'chromosome' literally means 'colored body' (chroma = color, soma = body).
Additional Knowledge:
• Option A, B, and C provide incorrect pairings of the scientists with their respective discoveries. For instance, Waldeyer did not coin the term Mutation, and Johannsen did not coin Polygenes. Understanding the historical timeline of genetics is crucial for competitive exams.