Question

A haemophilic man marries a carrier female. Identify the correct representation of the parents and their progeny from the given pedigree charts.

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

In the given question, information about the parents has only been provided. No information about the progeny has been given. So, in order to predict the correct pedigree chart, we must first try to attempt a cross between the given genotypes and obtain the possible genotypes of the progeny.
From the above cross, we can see that the progeny obtained includes a carrier daughter, haemophilic daughter, a normal son, and a haemophilic son. If this information is represented in the form of a pedigree, the correct answer would be option b.
Option a would be incorrect because, father is shown to be normal and mother as a carrier.
Option c would be incorrect because there is a normal daughter in the progeny.
Option d would be incorrect because the mother is shown to be normal.