Persons who are colour blind cannot distinguish between which of the following colours?

In an individual with phenylketonuria,there is an enzyme deficiency. This enzyme converts phenylalanine into ........ .

In Huntington's disease,the unaffected persons are homozygous for normal allele $h$. The following pedigree is erroneous because:

In sickle cell anemia -

Select the correct options for the given statements:
Statements:
$X$: Formation of Haemoglobin is controlled by two closely linked genes $HBA1$ and $HBA2$ on chromosome $16$ of each parent.
$Y$: $\beta$-Thalassemia is controlled by a single gene $HBB$ on chromosome $21$ of each parent.

If a color-blind man marries a normal woman,then regarding the vision of their offspring,which of the following is true?