Do monozygotic twins have higher genetic quality than dizygotic twins and singletons? Hints from attractiveness ratings and self-reported health

Citation

Kanazawa, Satoshi & Segal, Nancy L. (2019). Do monozygotic twins have higher genetic quality than dizygotic twins and singletons? Hints from attractiveness ratings and self-reported health. Evolutionary Biology. vol. 46 (2) pp. 164-169

Abstract

Evolutionary theories generally concur that sexual reproduction and genetic recombination evolved to maximize genetic variability. Thus, the existence of monozygotic (MZ) twins, which do not take advantage of genetic recombination for each offspring, poses a puzzle. Evolutionary logic of inclusive fitness suggests that parents with high-quality genes may be more likely to produce MZ twins. Analyses of data from the National Longitudinal Study of Adolescent to Adult Health show that MZ twins were significantly more physically attractive and healthier than dizygotic (DZ) twins and singletons. These results suggest that MZ twins may possess higher-quality genes than DZ twins and singletons, and support one of the first evolutionary theories of MZ twinning that specifies its ultimate functions.

URL

https://doi.org/10.1007/s11692-019-09470-0

Reference Type

Journal Article

Journal Title

Evolutionary Biology

Author(s)

Kanazawa, Satoshi
Segal, Nancy L.

Year Published

2019

Volume Number

46

Issue Number

2

Pages

164-169

Edition

February 09, 2019

ISSN/ISBN

1934-2845

DOI

10.1007/s11692-019-09470-0

Reference ID

7230