Question

Raju married to his sister's daughter the children suffer from delay in blood clotting guess the reason

Answer 1

Due to genetic defect because if we marry in same family if one partners carries a defect in any of the genes associated with some form of illness and we marry within the community with one who may also have such a family defect, the child inherits two copies of this faulty gene and thus has greater probability of defects.

Answer 2

this could b due to the fact that the genes didn't interchange Coz of being of the same family and hence diseases that existed in one family might keep on revolving around them only as per the international analysis this point has been noticed many a times