Article
Definitive Zygosity Scores in the Peas in the Pod Questionnaire is a Sensitive and Accurate Assessment of the Zygosity of Adult Twins.
Twin research and human genetics : the official journal of the International Society for Twin Studies - 1 Apr 2018
Jarrar Zakariya A, Ward Kirsten J, Mangino Massimo, Cherkas Lynn F, Gill Raj, Gillham-Nasenya Irina, Yarand Darioush, Hart Deborah, Hammond Christopher J, Spector Tim D
Abstract excerpt
Twin researchers face the challenge of accurately determining the zygosity of twins for research. As part of the annual questionnaire between 1999 and 2006, 8,307 twins from the TwinsUK registry were asked to complete five questions (independently from their co-twin) to ascertain their self-perceived zygosity during childhood on up to five separate occasions. This questionnaire is known as the 'peas in the pod'...
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