| Column-I | Column-II | ||
| A. | Incomplete dominance | I. | Drosophila |
| B. | Mendelian disorder | II. | Antirrhinum sp. |
| C. | Transforming principle | III. | Griffith |
| D. | Dihybrid cross | IV. | Haemophilia |
A) A-I; B-IV; C-III; D-II
B) A-IV; B-II; C-III; D-I
C) A-II; B-III; C-IV; D-I
D) A-II; B-IV; C-III; D-I
Correct Answer: D
Solution :
[d] Incomplete dominance (discovered by Correns) is the phenomenon where the dominant allele does not completely express itself. The inheritance of flower colour in Antirrhinum sp. is a good example of incomplete dominance. Haemophilia is a sex linked recessive disease. It is a type of Mendelian disorder since its inheritance follows the principles of Mendelian genetics and can be traced in a family by pedigree analysis. Transforming principle was given by Griffith. Dihybrid cross is a cross when two allelic pair are used for crossing. Several dihybrid crosses were carried out in Drosophila to study genes that were sex linked.
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