Okajima M, Usukura K
Hum Hered. 1984;34(5):285-90. doi: 10.1159/000153481.
The total minutia count (TMC) and fork index (FI), i.e., the proportion of forks in total minutiae, were examined in palm prints of 20 pairs each of monozygotic and dizygotic Japanese twins. No bilateral difference was found in either trait. The mean of the TMC was higher in males than in females, but the FI showed no sex difference. Both traits presented relatively high intraclass correlation coefficients between monozygotic twins, and genetic control of these traits is suggested. However, no correlation was observed between these two traits. A slight correlation was observed between the TMC and the total palmar interdigital ridge count. Some methodological problems concerned with classification criteria were discussed.
对20对单卵和双卵日本双胞胎的掌纹进行了总细节点计数（TMC）和分叉指数（FI，即分叉在总细节点中的比例）的检查。在这两个特征上均未发现双侧差异。男性的TMC平均值高于女性，但FI未显示出性别差异。这两个特征在单卵双胞胎之间均呈现出相对较高的组内相关系数，提示这些特征受遗传控制。然而，这两个特征之间未观察到相关性。TMC与手掌总指蹼嵴计数之间观察到轻微相关性。讨论了一些与分类标准有关的方法学问题。
