Match LIST I with LIST II:
| LIST I | LIST II |
|---|---|
| A. Dominant trait of pod colour in garden pea | I. Polygenic traits |
| B. The physical association of two genes on a chromosome | II. Pleiotropy |
| C. The traits generally controlled by three or more genes | III. Yellow |
| D. When a single gene exhibits multiple phenotypic expression | IV. Linkage |
| V. Green |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → A-V, B-IV, C-I, D-II
(A) Dominant trait of pod colour in garden pea — this matches (V) Green. In Mendel's peas green pod is dominant over yellow pod. (Yellow, III, is the dominant seed colour.)
(B) The physical association of two genes on a chromosome — this matches (IV) Linkage. Morgan used this term for genes lying together on one chromosome.
(C) The traits generally controlled by three or more genes — this matches (I) Polygenic traits. Human skin colour is an example; each allele adds a little.
(D) When a single gene exhibits multiple phenotypic expression — this matches (II) Pleiotropy. One gene affects several traits, as in phenylketonuria.