PATHOLOGY

Detailed explanation-1: -Females inherit an X chromosome from the mother and an X chromosome from the father. Males inherit an X chromosome from the mother and a Y chromosome from the father. This means that hemophilia almost always occurs in boys and is passed from mother to son through one of the mother’s genes.

Detailed explanation-2: -Hemophilia types A and B are inherited diseases. They are passed on from parents to children through a gene on the X chromosome. Females have two X chromosomes, while males have one X and one Y chromosome. A female carrier has the hemophilia gene on one of her X chromosomes.

Detailed explanation-3: -The son can get from the mother either her X chromosome with the hemophilia gene or her X chromosome with the normal blood clotting gene. If the son gets his mother’s X chromosome with the hemophilia gene he will have hemophilia.

Detailed explanation-4: -It almost always is inherited (passed down) from a parent to a child. Both hemophilia A and B are inherited in the same way, because both the genes for factor VIII and factor IX are located on the X chromosome (chromosomes are structures within the body’s cells that contain the genes).

Detailed explanation-5: -Hemophilia is caused by a mutation or change, in one of the genes, that provides instructions for making the clotting factor proteins needed to form a blood clot. This change or mutation can prevent the clotting protein from working properly or to be missing altogether. These genes are located on the X chromosome.