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A Case of Mongolism in DZ Female Twins Studied at 10 and then at 43 Years of Age

Published online by Cambridge University Press:  01 August 2014

William Walter Greulich ,
W. Roy Breg Jr. ,
Charles S. Culotta ,
Chris C. Plato  and
Herman Yannet
William Walter Greulich*
Affiliation:
National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, USA Department of Anatomy, Stanford University School of Medicine, Stanford, California, USA
W. Roy Breg Jr.
Affiliation:
Southbury Training School, Southbury, Connecticut, USA
Charles S. Culotta
Affiliation:
291 Whitney Avenue, New Haven, Connecticut, USA
Chris C. Plato
Affiliation:
National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, USA
Herman Yannet
Affiliation:
Southbury Training School, Southbury, Connecticut, USA
*
Department of Anatomy, Stanford University School of Medicine, Stanford, California 94305, USA

Abstract

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A pair of female mongoloid twins was studied when they were ten years old and, again, some thirty years later. A careful comparison was made of the similarities and differences between them in features or traits which have proved to be useful in determining the zygosity of like-sexed twins.

Though some of these characters can be, and frequently are, considerably modified in the presence of mongolism and so lose part of their value for that purpose, the differences noted in these twins, both as children and as middle-aged adults, are thought to outweigh their similarities and so warrant the conclusion that they are, indeed, dizygotic.

Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 24 , Issue 1-2 , January 1975 , pp. 47 - 61
Copyright
Copyright © The International Society for Twin Studies 1975

References

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