The sex ratios of monozygotic and dizygotic twins.
Fellman and Eriksson (2010) cited my suggestion that the sex ratio (proportion male) of monozygotic (MZ) twins is lower than that of dizygotic (DZ) twins (James 1975). Here I offer elaborations on and potential explanations for this.
James
William H
WH
The Galton Laboratory, Department of Genetics, Evolution and Environment, University College London, UK. whjames@waitrose.com
D005260:Female; D006801:Humans; D008297:Male; D012744:Sex Ratio; D014429:Twins, Dizygotic / Q000235:genetics*; D014430:Twins, Monozygotic / Q000235:genetics*; D049951:X Chromosome Inactivation / Q000235:genetics