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Quantitative Twin Analysis of Radial and Ulnar Ridge Counts and Ridge Count Diversity

Published online by Cambridge University Press:  01 August 2014

Terry Reed  and
Joe C. Christian
Terry Reed*
Affiliation:
Department of Medical Genetics, Indiana University School of Medicine, Indianapolis
Joe C. Christian
Affiliation:
Department of Medical Genetics, Indiana University School of Medicine, Indianapolis
*
Department of Medical Genetics, Indiana University, 1100 W. Michigan St., Indianapolis, IN 46223

Abstract

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Analysis of variance was performed on the radial and ulnar finger ridge counts and ridge count diversity index in 360 twin sets from which estimates of genetic variance were obtained. Findings for radial and ulnar counts paralleled those previously obtained for finger pattern type and ridge count (larger of radial and ulnar count). In contrast, ridge count diversity showed no indication of unequal total variances, as previously found for the total ridge count. One must be cautious not to exclude genetic influences on traits, such as the thumb variables in this study, where there are unequal total variances between monozygotic and dizygotic twins and the more conservative estimate of genetic variance is not significant.

Keywords

DermatoglyphicsTwin studyAnalysis of varianceRidge count
Type
Brief-Report
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 28 , Issue 2 , April 1979 , pp. 165 - 168
Copyright
Copyright © The International Society for Twin Studies 1979

References

REFERENCES

1.Christian, JC, Kang, KW, Norton, JA (1974): Choice of an estimate of genetic variance from twin data. Am J Hum Genet 26: 154–161.Google ScholarPubMed
2.Christian, JC, Norton, JA Jr (1977): A proposed test of the difference between the means of monozygotic and dizygotic twins. Acta Genet Med Gemellol 26:49–53.Google Scholar
3.Holt, SB (1968): “The Genetics of Dermal Ridges.” Springfield, Illinois: Charles C. Thomas.Google Scholar
4.Jantz, RL, Owsley, DW (1977): Factor analysis of finger ridge counts in blacks and whites. Ann Hum Biol 4:357–366.CrossRefGoogle ScholarPubMed
5.Reed, T, Sprague, FR, Kang, KW, Nance, WE, Christian, JC (1975): Genetic analysis of dermatoglypic patterns in twins. Hum Hered 25:263–275.CrossRefGoogle Scholar
6.Reed, T, Norton, JA Jr, Christian, JC (1977): Sources of information for discriminating MZ and D2 twins by dermatoglyphic patterns. Acta Genet Med Gemellol 26:83–86.CrossRefGoogle Scholar
7.Reed, T, Norton, JA Jr, Christian, JC (1978): Fingerprint pattern factors. Hum Hered 28:351–1978.CrossRefGoogle ScholarPubMed
8.Reed, T, Uchida, IA, Norton, JA Jr, Christian, JC (1978): Comparisons of dermatoglyphic: patterns in monochorionic and dichorionic monozygotic twins. Am J Hum Genet 30:383–391.Google ScholarPubMed
9.Reed, T, Evans, MM, Norton, JA Jr, Christian, JC (1979): Maternal effects on fingertip dermatoglyphics. Am J Hum Genet 31: (In press).Google ScholarPubMed
10.Roberts, DF, Coope, E (1975): Components of variation in a multifactorial character: A dermatoglyphic analysis. Hum Biol 47:169–188.Google Scholar
11.Schaumann, B, Alter, M (1976): “Dermatoglyphics in Medical Disorders.” New York: Springer-Verlag.Google Scholar