Which of the following is a genetic disease
Phenylketonuria
Blindness
Cataract
Leprosy
A man with normal vision whose father was colourblind marries with women whose father was also colourblind. Suppose their first child is daughter then what are the chances of this child to be colourblind?
A marriage between normal visioned man and colourblind woman will produce which of the following types of offsprings
Haemophilia $A$ is due to the absence of
Study the given pedigree chart and select the correct option of the given question.
$(1)$ Is the trait recessive of dominant ?
$(2)$ is the trait sex linked or autosomal ?
Haemophilic female marries normal male, the theoretical ratio of their offsprings regarding haemophilia will be