Pity. You did not explain the causes of mutations but the types. Sickle cell trait is highly selected for in malarial areas; it is the unfortnate circumstance of both parents having the trait where half the offspring have the trait, a quarter do not, and a quarter have sickle cell anemia.

Peter H.Dohan, MD

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Ex-surgical pathologist, now a photographer; partnered with a unique Chinese surgeon. Well travelled and full of simple love.

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peter dohan

peter dohan

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Ex-surgical pathologist, now a photographer; partnered with a unique Chinese surgeon. Well travelled and full of simple love.