Sex Differences in Intraindividual Tooth-Size Communalities

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Abstract
Intra-individual tooth size correlations were calculated for maxillary and mandlbular teeth of 137 Ohio white girls and 106 boys from the same population sample. For each tooth involved, intra-individual tooth size correlations were consistently higher for girls than for boys by 0.10, in 141 out of 182 individual correlations. This tendency for higher intra-girl tooth size correlations than for intra-boy (like the similar sex-difference in timing of tooth development and ossification timing) may be attributed to the reduplication of X-chromosomal material in the female.

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