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NEET 2025, Biology Q72: Interactions of Genes

NEET2025Biology
Q.

What is the pattern of inheritance for polygenic trait?

  1. A

    X-linked recessive inheritance pattern

  2. B

    Mendelian inheritance pattern

  3. C

    Non-mendelian inheritance pattern

  4. D

    Autosomal dominant pattern

Solution

A polygenic trait is controlled by two or more genes, often with additive effects, and typically shows continuous variation (e.g. height, skin colour). Such traits do not segregate in clean Mendelian ratios — they follow a non-Mendelian inheritance pattern.

Single-gene disorders, by contrast, follow Mendelian inheritance.

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