NEET Biology question

Biology Principles of Inheritance and Variation NEET

I. Haemophilia; II. Cystic fibrosis; III. Sickle-cell anaemia; IV. Colour blindness; V. Cancer; VI. Plague; VII. Phenylketonuria; VIII. Thalassaemia. Choose the correct options for Mendelian disorders.

(A)I, II, III, IV, VI, VIII
(B)I, II, III, IV, VII, VIIICorrect
(C)I, II, III, IV, V, VI
(D)I, II, III, IV, V, VIII

Answer: (B)

Solution

Mendelian disorders (caused by alteration or mutation in a single gene) among the listed conditions are haemophilia, cystic fibrosis, sickle-cell anaemia, colour blindness, phenylketonuria and thalassaemia. Cancer (V) is generally a complex, multifactorial

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Question ID VK-120057