ID: Class: 12 Subject: Biology Topic: Principles of Inheritance and Variation Type: Mcq Year: 2025

Question:

In the given pedigree chart, a cross between a normal couple resulted in a son who was haemophilic and a normal daughter. In course of time, when the daughter was married to a normal man, to their surprise the grandson was also haemophilic.
Choose the option that indicates the correct inheritance of trait in the above pedigree chart :
  • A. Autosome linked dominant trait
  • B. Sex-linked dominant trait
  • C. Autosomal recessive trait
  • D. Sex-linked recessive trait