The 'Thala test' is performed for the confirmation of:

$A$ normal girl, whose mother is haemophilic, marries a male with no ancestral history of haemophilia. What will be the possible phenotypes of the offsprings?
$(a)$ Haemophilic son and haemophilic daughter.
$(b)$ Haemophilic son and carrier daughter.
$(c)$ Normal daughter and normal son.
$(d)$ Normal son and normal daughter.
Choose the most appropriate answer from the options given below:

Assertion: Phenylketonuria is a recessive hereditary disease caused by the body's failure to oxidize the amino acid phenylalanine to tyrosine due to a defective enzyme.
Reason: It results in the presence of phenylalanine acid in urine.

Alkaptonuria is a condition in which

Which of the following is a Mendelian disorder?

Which of the following diseases in humans belongs to the same category as hemophilia?