$A$ woman whose father was an albino marries an albino man. What will be the ratio of their offspring?

In Cooley's Anemia,the affected chain of a haemoglobin is

If both parents are carriers of thalassemia,which is an autosomal recessive disorder,what is the probability of having an affected child?

Which of the following is a Mendelian disorder?

$A$ 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:

$A$ sex-linked recessive gene $c$ produces red-green colour blindness in humans. $A$ normal woman whose father was colourblind marries a colourblind man. Of all the girls born to these parents, what percentage is expected to be colourblind?