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Heredity of Twinning in Families of Monozygotic Twins

Published online by Cambridge University Press:  01 August 2014

L. Gedda ,
O. Russo  and
M. Capone
L. Gedda*
Affiliation:
Istituto di Genetica Medica e Gemellologia Gregorio Mendel, Roma
O. Russo
Affiliation:
Istituto di Genetica Medica e Gemellologia Gregorio Mendel, Roma
M. Capone
Affiliation:
Istituto di Genetica Medica e Gemellologia Gregorio Mendel, Roma
*
Istituto Mendel, Piazza Galeno 5, 00161 Roma, Italy

Abstract

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Whereas the existence of some genetic factor underlying the phenomenon of twinning is almost generally accepted with respect to DZ twins, no such agreement exists with respect to MZ twins. The possible existence of genetic factors underlying MZ twinning has been verified through an analysis of segregation in the sibships of MZ twins and in those of their parents, carried out on a sample of 57 MZ twin pairs (30 M and 27 F). Haldane's a priori method has been applied, considering the sample as obtained through a complete and through an incomplete ascertainment. The results may lead to cautiously confirm the hypothesis of some genetic conditioning of MZ twinning.

Type
2. The Twinning Phenomenon
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 25 , Issue 1 , January 1976 , pp. 70 - 72
Copyright
Copyright © The International Society for Twin Studies 1976

References

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