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

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation1 Mark
MCQ
Double lines in pedigree analysis show:
  • A
    Sex unspecified
  • B
    Consanguineous marriage
  • C
    Unaffected offspring
  • D
    Normal mating
✓

Answer

  1. Consanguineous marriage

Explanation:

Consanguineous marriage is a marriage between two blood-related individuals. A double line between parents indicates consanguineous marriages (between blood relatives). It increases the chance of a birth defect.

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