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Sickle cell anemia is a genetic blood disorder where red blood cells lose their flexibility and...

Sickle cell anemia is a genetic blood disorder where red blood cells lose their flexibility and assume an abnormal, rigid, sickle shape, which results in a risk of various complications. If both parents are carriers of the disease, then a child has a 25% chance of having the disease, 50% chance of being a carrier, and 25% chance of neither having the disease nor being a carrier. If two parents who are carriers of the disease have 5 children, what is the probability that: (a) 4 will have the disease? (b) 5 will have the disease? (c) at least 3 will neither have the disease nor be a carrier? (d) the first child with the disease will be child number 4 ?

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