Young R S, Reed T
Hum Hered. 1980;30(3):145-8. doi: 10.1159/000153118.
The effect of maternal age on the degree of bilateral asymmetry found in digital ridge counts was explored as a possible explanation for a previously detected maternal effect, where significantly less variation was observed in thumb ridge counts between the two sibships within families of female monozygotic (MZ) twins than between sibships within families of male MZ twins. Contrary to a previous report which found a tendency for ridge count asymmetry to increase with maternal age, this study could show no such relationship. It was concluded that while the exact nature of the maternal effect noted for thumb ridge counts is unclear, it is little influenced by maternal age.
探讨了母亲年龄对指纹嵴计数中双侧不对称程度的影响，以此作为对先前发现的母体效应的一种可能解释。在女性同卵（MZ）双胞胎家庭的两个同胞组之间，拇指嵴计数的变异明显少于男性MZ双胞胎家庭同胞组之间的变异。与之前一项发现嵴计数不对称性有随母亲年龄增加趋势的报告相反，本研究未发现这种关系。得出的结论是，虽然拇指嵴计数所显示的母体效应的确切性质尚不清楚，但它受母亲年龄的影响很小。
