http://www.revisegamsat.com Free Resources and tips to help you pass GAMSAT Thu, 18 Mar 2010 17:17:24 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 http://www.revisegamsat.com/practice-test-green-booklet/reasoning-in-biological-and-physical-sciences/unit-16-reasoning-in-biological-and-physical-sciences-practice-test-green-booklet/unit-16-heterozygousity-and-cystic-fibrosis-319 http://www.revisegamsat.com/practice-test-green-booklet/reasoning-in-biological-and-physical-sciences/unit-16-reasoning-in-biological-and-physical-sciences-practice-test-green-booklet/unit-16-heterozygousity-and-cystic-fibrosis-319#comments Sun, 16 Aug 2009 12:34:43 +0000 Nicholas Johnson http://www.revisegamsat.com/?p=319 The chance that a couple will both be heterozygous is 1/20 x 1/20 or 1/400. The chance that a baby from such a couple will be homozygous is 1/4 so the combined chance is 1/400 x 1/4 = 1/1600.

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