Supernumerary distal limb elements induced by 5‐fluoro‐2′‐deoxycytidine in mice

Polydactyly (including triphalangy) in C57BL/10 mice inducedby various dosages of 5-fluoro-2′-deoxycytidine given at gestation day IX or XI isdescribed. These data are compared with those on aplasias in order to elucidate whether polydactyly is truly supernumerary or is the result of malposition of limb elements.