Tay Sachs disease is inherited as an autosomal recessive. It is a devastating neurological disease that results from the lack of a normal enzyme "A" whose job is to metabolize lipids that are found in brain cells. A young couple is told they are both carriers of the disease. Explain as you would to the couple their likelyhood od having a child with Tay Sachs. Show the Punnet square that illustrates their chances.