Sex ratios provide evidence for monozygotic twinning in the ring-tailed lemur, Lemur catta

John St Clair, Roisin Campbell-Palmer, Richard Lathe

Research output: Contribution to journalArticlepeer-review

Abstract

Monozygotic (MZ) twinning is generally considered to be rare in species other than human. We inspected sex ratios in European zoo-bred ring-tailed lemurs (Lemur catta), revealing a significant excess of same-sex twins. Of 94 pairs, 60 (64%) were either both males or both females (p = .004). Application of the Weinberg differential rule argues that 27% of all twins in this species are MZ pairs. In this protected species, where twinning is commonplace (~50% of newborns are twins), the probable existence of frequent MZ twinning has ramifications for breeding programs aimed to maximize genetic diversity, and suggests that twin studies in a species other than human could have potential as a medical research tool.

Original languageEnglish
Pages (from-to)51-5
Number of pages5
JournalTwin Research and Human Genetics
Volume17
Issue number1
DOIs
Publication statusPublished - Feb 2014

Keywords

  • Animals
  • Female
  • Humans
  • Lemur
  • Male
  • Pregnancy
  • Sex Ratio
  • Twinning, Monozygotic
  • Journal Article

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