Select the incorrect statement with regard to hemophilia:

Explanation

They asked the WRONG statement about haemophilia in option A. Haemophilia is a sex-­linked disease which is also known as bleeder's disease as the patient will continue to bleed even from a minor cut since he or she does not possess the natural phenomenon of blood clotting due to the absence of anti-haemophiliac globulin or factor VIII (hemophilia-A) and plasma thromboplastin factor IX (hemophilia-B, Christmas disease) essential for it. As a result of continuous bleeding, the patient may die of blood loss. It is genetically due to the presence of a recessive sex-linked gene h, carried by the X ­chromosome. A female becomes a hemophiliac only when both of her X­-chromosomes carry the gene (Xh Xh). However, such females generally die before birth because the combination of these two recessive alleles is lethal. A female having only one allele for hemophilia (XXh) appears normal because the allele for normal blood clotting present on the other X­-chromosome is dominant. Such females are known as carriers. In the case of males, a single gene for the defect is able to express itself as the Y­ chromosome is devoid of any corresponding allele (Xh Y).