Class 12 · Principles of Inheritance and Variation

Enzyme Defects in Genetic Disorders — NEET Biology

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The normal/less efficient enzyme, or (ii) a non-functional enzyme, or (iii) no enzyme at all

NCERT Biology · Class 12 · Chapter 4 · Paragraph 38
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Adjacent to a frequently-asked paragraph in the same chapter.

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QuestionPredicted for NEET 2027

Evaluate dominance: (1) Dominance depends on gene product and phenotype we examine. (2) Recessive phenotype results when non-functional enzyme produced. (3) Equivalent alleles can produce same genotype despite sequence changes. (4) In starch synthesis, heterozygotes show intermediate grain size if measured. (5) Therefore, dominance is autonomous property of a gene. Which statements are correct?

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