NEET BIOLOGY

Detailed explanation-1: -Hemophilia is a sex-linked recessive disorder. The abnormal gene responsible for hemophilia is carried on the X chromosome. Males have one X chromosome and one Y chromosome.

Detailed explanation-2: -Hemophilia A and hemophilia B are inherited in an X-linked recessive pattern . The genes associated with these conditions are located on the X chromosome, which is one of the two sex chromosomes . In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition.

Detailed explanation-3: -Duchenne muscular dystrophy, some types of colorblindness and hemophilia A are examples of X-linked recessive disorders. A man with an X-linked recessive disorder will pass his unaffected Y chromosome to his sons, and none will be affected.

Detailed explanation-4: -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.