Abstract:
:Previous works on the inheritance of dental traits have traditionally followed Fisher's model for family data under the assumption that phenotypic similarity between relatives is due solely to genetic factors. This study uses recent causal models that incorporate the contribution of nonrandom environmental sources of variation to familial resemblance on dental size. Path analysis was applied to observed interclass and intraclass correlations of sex-specific parent-offspring and sib pairs in 293 Pima Indian families from the southwest United States. The mesiodistal dimension of an early-forming and stable tooth (first molar) was contrasted with a late-forming and variable tooth (upper lateral incisor) for genetic and familial environmental components of variation. Parameters were estimated according to the XTAU models of Rice et al. (1980) and linear constraints placed upon the parameters were tested. The proportion of variance accounted for by genetic and environmental transmissible factors is estimated to be 52% for the first molar and 35% for the lateral incisor. Neither X-linkage nor sex-specific environmental effects are required to explain the transmission of dental size. Nontransmissible environmental effects that account for sibling correlations are detectable. Furthermore, sex differences are found in correlated sibling environments for the lateral incisor but not the first molar, to explain in part male-female differences in the distributions of the upper lateral incisor size.
journal_name
Am J Phys Anthropoljournal_title
American journal of physical anthropologyauthors
Potter RH,Rice JP,Dahlberg AA,Dahlberg Tdoi
10.1002/ajpa.1330610302subject
Has Abstractpub_date
1983-07-01 00:00:00pages
283-9issue
3eissn
0002-9483issn
1096-8644journal_volume
61pub_type
杂志文章abstract::Data on orangutans (Pongo pygmaeus abelii) living in a Sumatran swamp forest yield an estimated median interbirth interval of at least 8 years, concurring with findings from other sites. This longest known mammalian interbirth interval appears due to maternal amenorrhea during the long exclusive dependence of the offs...
journal_title:American journal of physical anthropology
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doi:10.1002/ajpa.10426
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abstract::A new method for estimating adult age-at-death from the first rib was developed as a modification of the Kunos et al. (Am J Phys Anthropol 110 (1999) 303-323) method. Data were collected on three aspects of the first rib (costal face, rib head, and tubercle facet) for 470 known-age males of Balkan ancestry collected a...
journal_title:American journal of physical anthropology
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doi:10.1002/ajpa.20916
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journal_title:American journal of physical anthropology
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更新日期:1979-02-01 00:00:00
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journal_title:American journal of physical anthropology
pub_type: 杂志文章,评审
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journal_title:American journal of physical anthropology
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更新日期:1986-06-01 00:00:00
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journal_title:American journal of physical anthropology
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doi:10.1002/ajpa.1330930408
更新日期:1994-04-01 00:00:00
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journal_title:American journal of physical anthropology
pub_type: 历史文章,杂志文章
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更新日期:1988-04-01 00:00:00
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journal_title:American journal of physical anthropology
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更新日期:2009-01-01 00:00:00
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journal_title:American journal of physical anthropology
pub_type: 历史文章,杂志文章
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更新日期:2018-05-01 00:00:00
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journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.21136
更新日期:2009-11-01 00:00:00
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journal_title:American journal of physical anthropology
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journal_title:American journal of physical anthropology
pub_type: 杂志文章
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更新日期:1998-06-01 00:00:00
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journal_title:American journal of physical anthropology
pub_type: 历史文章,杂志文章
doi:10.1002/ajpa.20292
更新日期:2006-03-01 00:00:00
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journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.1330420318
更新日期:1975-05-01 00:00:00
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journal_title:American journal of physical anthropology
pub_type: 历史文章,杂志文章
doi:10.1002/ajpa.1330920306
更新日期:1993-11-01 00:00:00
abstract:OBJECTIVES:To determine whether (1) maximal handgrip strength (HGS) is associated with inter-island level of economic development in Vanuatu, (2) how associations between island of residence and HGS are mediated by age, sex, body size/composition, and individual sociodeomographic variation, and (3) whether HGS is predi...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.23704
更新日期:2018-12-01 00:00:00
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journal_title:American journal of physical anthropology
pub_type: 杂志文章
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journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.1330850105
更新日期:1991-05-01 00:00:00
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doi:10.1002/ajpa.1330810109
更新日期:1990-01-01 00:00:00
abstract::The new species Agerinia smithorum (Adapiformes, Primates) from the early Eocene of the Iberian Peninsula is erected in this work. An emended diagnosis of the genus is provided, together with a broad description of the new species and comparisons with other samples assigned to Agerinia and other similar medium-sized c...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.23014
更新日期:2016-09-01 00:00:00
abstract::Sattenspiel and Harpending (1983, American Antiquity 48(3): 489-498) have stated that the life expectancy at birth (e0(0] which paleodemographers calculate from skeletal population data is actually the mean age at death (ad) of the population. Yet, only when a population is neither growing or declining (i.e., is stati...
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pub_type: 杂志文章
doi:10.1002/ajpa.1330760207
更新日期:1988-06-01 00:00:00
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journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.10314
更新日期:2004-03-01 00:00:00
abstract::Leprosy was a well-recognized and dreaded disease in medieval Europe (5th-15th century AD). It is reported to have reached Germany with the Roman invasion. A much larger fraction than previously assumed appears to have been affected by leprosy in the medieval period. This article estimates the frequency (i.e., the pre...
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pub_type: 历史文章,杂志文章
doi:10.1002/ajpa.20744
更新日期:2008-03-01 00:00:00
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journal_title:American journal of physical anthropology
pub_type: 杂志文章
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更新日期:2012-08-01 00:00:00
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更新日期:2011-05-01 00:00:00
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journal_title:American journal of physical anthropology
pub_type: 杂志文章,评审
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更新日期:2015-02-01 00:00:00
abstract::Understanding the mechanical features of cortical bone and their changes with growth and adaptation to function plays an important role in our ability to interpret the morphology and evolution of craniofacial skeletons. We assessed the elastic properties of cortical bone of juvenile and adult baboon mandibles using ul...
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pub_type: 杂志文章
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更新日期:2010-04-01 00:00:00