Prep4USMLE Forum » USMLE Step 1 Forum » Behavioral Science Forum |   please explain the answer

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nadiabarati	06/06/06 - 11:41 AM             #1 Results of twin concordance study for inheritance to mental retardation shows:80% for MZ,20% for DZ.what is the proportion of inheritance of mental retardation? A.40% B.55% C.60% D.75% E.80%
study_ing Forum Fanatic Topics: 180 Posts: 2,511	06/06/06 - 12:43 PM             #2 ( 80 % -20 %) divided by ( 100 - 20 ) the formula for heretibility is concrdance(C) (C)mz -(C) DZ ------------------------------ 1 - (C) DZ Edited by study_ing on 06/06/06 - 11:13 PM ___________________ If you yourself are at peace, then there is at least some peace in the world.
nadiabarati	06/06/06 - 03:19 PM             #3 thanks a lot
study_ing Forum Fanatic Topics: 180 Posts: 2,511	06/06/06 - 11:15 PM             #4 no problem ___________________ If you yourself are at peace, then there is at least some peace in the world.

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