Abstract
We have replicated an earlier study (Roseet al., Behav. Genet. 17, 125–140, 1987) relating dermatoglyphic asymmetry to intrapair discordance in a completely new sample of monozygotic (MZ) twins. Consistent results were observed for at least 31 of 37 Minnesota Multiphasic Personality Inventory (MMPI) scales tested in the two samples. Intrapair differences were confirmed to be greater in 28 MZ pairs with asymmetric palmara−b ridge counts than in 29 MZ pairs with little or noa−b asymmetry for at least 15 sclaes. We also examined longitudinal stability over a 4 to 5-year period for six MMPI scales and found suggestive evidence in three scales for greater test-retest instability in twin pairs asymmetric fora−b ridge count. The results offer new evidence for our hypothesis that an asymmetrica−b ridge count may identify individuals who are poorly buffered from developmental noise, but analyses of symmetric and asymmetrica−b ridge counts in nontwin subjects are required to extend and test the hypothesis further.
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Bogle, A.C., Reed, T. & Rose, R.J. Replication of asymmetry ofa−b ridge count and behavioral discordance in monozygotic twins. Behav Genet 24, 65–72 (1994). https://doi.org/10.1007/BF01067929
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DOI: https://doi.org/10.1007/BF01067929