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The genetic‐determination of ossification sequence polymorphism

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TLDR
Findings support the contention that the major part of variation in ossification sequence is genetically determined.
Abstract
Serial hand-wrist x-rays of 81 pairs of twins were examined to investigate the genetics of ossification sequence polymorphism. Discordance in ossification sequence was 3.5 times more common between like-sex dizygotic twins than between monozygotic twins, with the difference being significant at the 0.01 level of confidence. These findings support the contention that the major part of variation in ossification sequence is genetically determined.

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Explaining sex differences in dental caries prevalence: saliva, hormones, and "life-history" etiologies.

TL;DR: The results suggest that hormonal fluctuations can have a dramatic effect on the oral health of women, and constitute an important causal factor in explaining sex differences in caries rates.
Book ChapterDOI

Developmental Genetics of Man

TL;DR: An analysis of present knowledge about the genetic influences on growth and development in normal human beings and the environment common to individuals of the same family has to be taken into account, adding to the ambiguity of the evidence.
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Economic impact on postnatal ossification.

TL;DR: The magnitude of economic impact on postnatal ossification timing in generally lower-income boys and girls of European ancestry was found to be 0.21 standard deviation units or Z-scores for a difference of approximately $2200.00 in per-capita income.
Book ChapterDOI

Genetics of Maturational Processes

TL;DR: The genetics of human maturational events, like the conventional genetics of dimensional development, has long been inferred from two different, quasi-experimental procedures, the population comparison and family-line analysis.
References
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Journal ArticleDOI

Ossification sequence polymorphism and sexual dimorphism in skeletal development.

TL;DR: Ossification sequence polymorphism is more clearly defined in later-developing children, where the appearance of ossification centers is distributed among a larger number of radiographic class intervals, and may explain the apparent relationship between ossifying sequence polymophism and developmental delay or retardation.
Journal ArticleDOI

Parent-Child Similarities in Hand-Wrist Ossification

TL;DR: A familial syndrome involving the disproportionately late appearance of a cluster of carpal centers and twin similarities in both the sequences of hand ossification and epiphyseal union is described.
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