Haemophilia $A$ is due to the absence of
Antihaemophilic globulin
Calcium
Plasma thromboplastin
$X$ chromosome
A husband and wife have normal vision but fathers of both of them were colour blind. Probability of their first daughter to be colour blind is
In which of the following colourblindness is inherited
If both parents are carriers for thalassaemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
Both husband and wife have normal vision though their fathers were colourblind and mothers did not have any gene for colour blindness. The probability of their daughter becoming colourblind is
Assertion : Haemophilia is a recessive sex linked disease.
Reason : Haemophilia occurs due to mutation of a structural gene on chromosome $15$.