Haemophilia is caused due to the lack 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:

Which one of the following is a dominant trait?

Which of the following diseases is autosomal recessive?

$A$ man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind (in $\%$)?

Who among the following is associated with biochemical genetics?