Non-Mendelian transmission in a human developmental disorder: split hand/split foot.

Jarvik, G P; Patton, M A; Homfray, T; Evans, J P · Am J Hum Genet · 1994

case_control · Level III

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Abstract

The study of Mendelian disorders that do not meet some Mendelian expectations has led to an increased understanding of such previously obscure genetic phenomena as anticipation. Split hand/split foot (SHSF), a human developmental malformation, demonstrates such distinctive genetic features as reduced penetrance and variable expressivity. In this study, new pedigrees with defined ascertainment confirm the existence of non-Mendelian transmission characterized by the overtransmission of SHSF from affected fathers to sons.

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