Twinning historic drawing by William Smellie (1697-1763)
Sesquizygotic twinning is a rare intermediate form of twinning, lying between mono-zygotic and dizygotic twinning, the twins can be maternally identical but chimerical for their paternal genome. This rare twinning event has been recently identified by a twin amniocentesis genotyping study[1] that showed twins that were maternally identical, but chimerically shared 78% of their paternal genome.
Links: twinning | amniocentesis | NEMJ | UNSW News 29Feb2019 | Search Pubmed
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