Which of the following disorders is an autosomal recessive disorder?

Both a man and a woman are affected by Vitamin $D$-resistant rickets,which is an $X$-linked dominant trait. All the daughters of this couple are affected by rickets,but some of the sons are not. What are the genotypes of the parents?

Which of the following is not a correct statement regarding Phenylketonuria?

When a hemophilic male $(X^h Y)$ marries a carrier female $(X^H X^h)$ for hemophilia,what are the chances of all daughters born being normal (in $\%$)?

Haemophilia is a condition where there is . . . . . .

If an albino man marries a normal woman and $50$ offspring are albino and $50$ are normal,the woman is: