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NEET UG BIOLOGY MCQ: PRINCIPLE OF INHERITANCE AND VARIATION

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Analyzing +4 | -1

Assertion : Sickle-cell anaemia is a genetically
determined disorder affecting many new born
babies.

Reason : It is caused by heterozygosity for
allele

H{b^s}

producing a single amino acid
substitution in the a-chain of the normal
haemoglobin molecule determined by allele

H{b^A}

View answer and explanation

Correct option: C

If Assertion is true but Reason is false

Option C (Assertion is true but Reason is false) is correct because sickle-cell anemia is caused by homozygosity for the Hb^s allele, not heterozygosity.

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