Zoology - Principles of Inheritance and Variation Question with Solution | TestHub
Match List I with List II :
| List I | List II |
|---|---|
| A. Incomplete dominance | I. Human skin colour |
| B. Co-dominance | II. Inheritance of flower colour in Antirrhinum sp. |
| C. Pleiotropy | III. Phenylketonuria disease in humans |
| D. Polygenic inheritance | IV. ABO blood groups |
Choose thecorrectanswer from the options given below :NEET 2026 (Cancelled)
Options:
Answer:
Solution:
Incomplete dominance is observed in the inheritance of flower colour in Antirrhinum sp. (snapdragon), where the heterozygous phenotype is intermediate between the two homozygous phenotypes.
Co-dominance is exhibited by ABO blood groups in humans, where both alleles and express themselves fully in a heterozygous individual.
Pleiotropy occurs when a single gene influences multiple phenotypic traits. Phenylketonuria is an example of pleiotropy in humans, where a single gene mutation leads to mental retardation and a reduction in hair and skin pigmentation.
Polygenic inheritance involves traits controlled by three or more genes, such as human skin colour.
Therefore, the correct matching is A-II, B-IV, C-III, D-I.
Answer: A-II, B-IV, C-III, D-I
