NEETZoologyPrinciples of Inheritance and Variation
What is required for a female to become a haemophilic?
Options
- AThe mother must be a carrier and the father must be haemophilic
- BBoth parents must be carriers of the haemophilia gene
- CThe mother must be haemophilic and the father must be a carrier
- DThe mother must be unaffected and the father must be a carrier
Correct answer
A. The mother must be a carrier and the father must be haemophilic
Step-by-step solution
This sex linked recessive disease, which shows its transmission from unaffected carrier female to some of the male progeny has been widely studied. In this disease, a single protein that is a part of the cascade of proteins involved in the clotting of blood is affected. Due to this, in an affected individual a simple cut will result in non-stop bleeding. The heterozygous female (carrier) for haemophilia may transmit the disease to sons. The possibility of a female becoming a haemophilic is extremely rare because mo