Genetic and Environmental Influences on the Relative Timing of Pubertal Change
نویسندگان
چکیده
منابع مشابه
Genetic and environmental influences on the relative timing of pubertal change.
A multicategory item-response theory model was developed to characterize developmental changes in three items relating to the assessment of puberty in adolescent twin girls and boys. The model allowed for the fixed effects of age on probability of endorsing the responses and for the random effects of individual differences on the timing of pubertal changes relative to chronological age. In girl...
متن کاملRelative Roles of Genetic and Environmental Influences
Methods: Twins were surveyed for the known presence ofmaculardegeneration.Enrolled twinsunderwenta standardizedexaminationandfundusphotography.Age-related maculardegenerationevaluationwascompleted for840elderlymale twins,210monozygoticand181dizygoticcomplete twin pairs, both concordant and discordant for presenceorabsenceofAMD,and58singletons.Abivariate twin model incorporatinginitial screening...
متن کاملthe effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
Twin models of environmental and genetic influences on pubertal development, salivary testosterone, and estradiol in adolescence.
OBJECTIVE Research on sources of variation in adolescent's gonadal hormone levels is limited. We sought to decompose individual differences in adolescent testosterone, estradiol, and pubertal status, into genetic and environmental components. DESIGN A sample of male and female adolescent twins from the greater Austin and Houston areas provided salivary samples, with a subset of participants p...
متن کاملDevelopmental changes in genetic and environmental influences on rule-breaking and aggression: age and pubertal development.
BACKGROUND Antisocial behavior (ASB) can be meaningfully divided into nonaggressive rule-breaking versus aggressive dimensions, which differ in developmental course and etiology. Previous research has found that genetic influences on rule-breaking, but not aggression, increase from late childhood to mid-adolescence. This study tested the extent to which the developmental increase in genetic inf...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Twin Research
سال: 2004
ISSN: 1369-0523
DOI: 10.1375/twin.7.5.471