Why Tay-Sachs disease persisted in human?

Where is the Great Saphenous vein located? What are symptoms of chronic giardiasis? Is ugliness contagious? What is the enzyme present in gastric juice digests protein? What kind of medical assistance will the affected child need for hemophilia a? Is mineral oil high in cholesterol? What is the difference between the resting heart rate and the working heart rate? What is the structure and function of antibodies? What was hearts score today? Is a prgnancy test accurate if your still waiting on your period but the pregnancy test is positive? Can you do anything to help spinal disc dessication? How do you type a o with a slash through it? What is level 2 obesity? when should a child be able to blow out candles and have the lung capacity to do it? What is the predominant antibody in mucus and saliva and tears and milk? How do ladies produce milk? What type of activities develop andurance? What is the most common type of light give to us? Why was circumcision invented? What are the symptoms of upper limb disorders?