Find the disease by analysing pedigree chart.: (A) Sickle cell anaemia, (B) Diabetes insipidus, (C) Hunter syndrome, (D) Crouzon syndrome
Answer is D. Rule of dominance - If the child is diseased, one of the parent must be diseased.
Rule of X-linked - Father never transmits to son.
In the image - Father transmits to son.
Crouzon syndrome is autosomal dominant.