Which of the following disorders is more commonly observed in males than in females?

Both male and female have normal vision though their fathers were colour blind,and mothers did not have any gene for colour blindness. The probability of their daughter becoming colour blind is (in $\%$)

Which of the following conditions is harmful in itself but also provides protection against a mosquito-borne infectious disease?

Mr. Stevan is suffering from haemophilia and cystic fibrosis. His father is heterozygous for cystic fibrosis. The probability of Stevan's sperm having recessive $X$-linked as well as autosomal allele is

What will be the percentage of affected sons,whose father is colour-blind and mother is normal (in $\%$)?

$A$: The heterozygotic female for haemophilia may transmit the disease to sons.
$R$: Such traits show criss-cross inheritance.