Genest F B, Genest P
Ann Genet. 1983;26(3):174-6.
A dermatoglyphic research on the absence of the palmar c-triradius was carried out in a Canadian family line originating from a French married couple who settled in the Quebec City area in 1649. Of the 51 individuals examined, 34 showed that c-triradius was missing on one or both palms. The study of the family tree and of the data confirms the hypothesis that an absent palmar c-triradius is an autosomal dominant trait transmitted by an heterozygous genotype with, in the present observation, an incidence of 66,6% and an estimated penetrance of 44,1%.
对一个起源于1649年定居在魁北克市地区的法国夫妇的加拿大家系进行了一项关于手掌c三叉点缺失的皮纹学研究。在接受检查的51个人中，有34人显示一只或两只手掌上的c三叉点缺失。对家族谱系和数据的研究证实了这样一个假设，即手掌c三叉点缺失是一种常染色体显性性状，由杂合基因型传递，在本观察中，发病率为66.6%，估计外显率为44.1%。
