Unpredictable: Genetics plays a small role and environment a huge role...As does attitude. You can be healthy with a bad attitude or sick with a good attitude and both live equally long. Jim fixx ( marathon runner) died young and george burns lived to 100. A healthy lifestyle keeps "genetic predispositions" from showing up and overall such people wold be expected to live longer. The will to live is important..
Answered 7/20/2012
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