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Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation1 Mark
MCQ
An example of the quantitative trait in man is:
  • A
    Hair colour
  • B
    Colour of eye
  • C
    Skin colour
  • D
    Shape of nose
✓

Answer

  1. Skin colour

Explanation:

A measurable trait that shows continuous variation; a trait that can not be classified into a few discrete classes is called as quantitative trait.

Examples of quantitative traits include height, skin colour, weight and blood pressure.

There is no single gene for any of these traits, instead it is generally believed that continuous variation in a trait such as blood pressure is partly due to DNA sequence variations at multiple genes.

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