Fundamentholfundamenthol
NEET2026Biology
Q.

Match List I with List II :

List-IList-II
A.Incomplete dominanceI.Human skin colour
B.Co-dominanceII.Inheritance of flower colour in Antirrhinum sp.
C.PleiotropyIII.Phenylketonuria disease in humans
D.Polygenic inheritanceIV.ABO blood groups

Choose the correct answer from the options given below :

  1. A

    A-II, B-IV, C-III, D-I

  2. B

    A-I, B-III, C-II, D-IV

  3. C

    A-I, B-IV, C-III, D-II

  4. D

    A-II, B-I, C-III, D-IV

Solution

Flower-colour inheritance in snapdragon (Antirrhinum sp.) is the classical example of incomplete dominance.

ABO blood groups exhibit co-dominance, seen clearly in individuals with the AB blood group (II).

Phenylketonuria illustrates pleiotropy because a single gene produces multiple phenotypic effects.

Human skin colour is determined by three pairs of non-allelic genes and is therefore an example of polygenic inheritance.

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