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Genetic Basis of Individual Differences in Tissue Composition

Published online by Cambridge University Press:  27 January 2025

T. Ohtsuki  and
V. Klissouras
T. Ohtsuki
Affiliation:
Exercise Physiology Laboratory, University of Tokyo, Japan
V. Klissouras*
Affiliation:
Ergophysiology Laboratory, McGill University, Montreal, Canada
*
Physiology Department, McGill University, P. O. Box 6070, Station « A », Montreal, Quebec, Canada, H3C 3G1

Abstract

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A total of 10 pairs of twin adolescent boys, 14 MZ and 5 DZ, were used to determine the relative contribution of the genotype to the individual differences observed in surface density of muscle, subcutaneous fat, and bone. The cross-sectional areas of these tissue components were calculated from photographs of the upper arm, taken by means of an ultrasonic apparatus. The respective mean percentage intrapair difference in MZ and DZ twins was 6.9 and 9.8 for total area, 6.6 and 7.8 for muscle, 13.9 and 32.0 for fat, and 6.7 and 31.3 for bone tissue. Interindividual variations in bone only could be ascribed to genetic differences.

Type
5. Twin Studies in Human Genetics
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 25 , January 1976 , pp. 157 - 163
Copyright
Copyright © The International Society for Twin Studies 1976

References

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