All the X -chromosome linked genetic disease I have studied (Color-blindness, Haemophilia, Muscular dystrophy) happen due to a recessive gene.
At first, I thought it was because there could be a 'good' copy of that gene on the other X chromosome (in case of females). So that's why these genes are recessive. But this is a bogus reasoning, I soon realised.
So, why X-linked genetic diseases happen due to a recessive gene? Maybe not all. But why some are recessive?