Which one is a sex-linked disease

Which type of pollination method was adopted by Mendel in his experiment?

Heterozygous tall and violet flowered pea plants were selfed and total $512$ seeds are collected. What will be total number of seeds for both heterozygous traits?

Edward syndrome is on account of .......

Assertion : Phenylketonuria is a recessive hereditary disease caused by body’s failure to oxidize an amino acid phenylalanine to tyrosine, because of a defective enzyme.

Reason : It results in the presence of phenylalanine acid in urine.

If an albino man marries with a normal woman and $50$ offsprings are albino and $50$ are normal, the woman is