Genetic Variance in Dental Dimensions of Punjabi Twins
- 1 December 1985
- journal article
- research article
- Published by SAGE Publications in Journal of Dental Research
- Vol. 64 (12) , 1389-1391
- https://doi.org/10.1177/00220345850640121301
Abstract
Genetic variance analysis of 56 tooth size traits was based on a sample of 58 pairs of twins (23 MZ and 35 DZ) from Chandigarh, India. Results of a t-test for equality of means showed no association of zygosity with any of the traits. Heterogeneity of total variance was found in 18 traits, which invalidates conventional genetic variance estimates and reveals considerable hidden environmental determinance. In contrast to other studies, Indian MZ twins had higher variance than did DZ twins, in most instances. There was also evidence of stronger environmental covariance for MZ and DZ twins. The study revealed substantial, complex environmental determination for some dental dimensions, especially of incisors and second molars.Keywords
This publication has 14 references indexed in Scilit:
- Genetic analysis of occlusal variation in twinsPublished by Elsevier ,2004
- A family study of anthropometric traits in a Punjabi community: II. An investigation of familial transmissionAmerican Journal of Physical Anthropology, 1984
- Developmental correlates of crown component asymmetry and occlusal discrepancyAmerican Journal of Physical Anthropology, 1981
- The effect of prenatal factors on crown dimensionsAmerican Journal of Physical Anthropology, 1979
- Association of Twin Zygosity With the Mean and Variance of Tooth SizeActa geneticae medicae et gemellologiae: twin research, 1979
- Testing Twin Means and Estimating Genetic Variance.Basic Methodology for the Analysis of Quantitative Twin DataActa geneticae medicae et gemellologiae: twin research, 1979
- A Proposed Test of the Difference Between the Means of Monozygotic And Dizygotic TwinsActa geneticae medicae et gemellologiae, 1977
- Dominance and Environmental Variances: Their Effect on Heritabilities Estimated from Twin DataHuman Heredity, 1976
- The estimation of genetic variance from twin dataBehavior Genetics, 1970
- Heredity and the craniofacial complexAmerican Journal of Orthodontics, 1959