▪ Abstract Human behavioral genetic research aimed at characterizing the existence and
nature of genetic and environmental influences on individual differences in cognitive ability …

Abstract Purpose of Review There is considerable variability in human body weight, despite
the ubiquity of the 'obesogenic'environment. Human body weight has a strong genetic basis …

Background: Both genetic and environmental factors are known to affect body mass index
(BMI), but detailed understanding of how their effects differ during childhood and …

We investigated the heritability of educational attainment and how it differed between birth
cohorts and cultural–geographic regions. A classical twin design was applied to pooled data …

Height variation is known to be determined by both genetic and environmental factors, but a
systematic description of how their influences differ by sex, age and global regions is …

Background Genes and the environment contribute to variation in adult body mass index
[BMI (in kg/m 2)], but factors modifying these variance components are poorly understood …

Background Smokers tend to weigh less than never smokers, while successful quitting leads
to an increase in body weight. Because smokers and non-smokers may differ in genetic and …

This paper is a revised and updated edition of a previous description of the Quebec
Newborn Twin Study (QNTS), an ongoing prospective longitudinal follow-up of a birth cohort …

Human height variation is determined by genetic and environmental factors, but it remains
unclear whether their influences differ across birth-year cohorts. We conducted an individual …

Individuals with overweight or obesity (OW/OB) are at increased risk for significant physical
and psychological comorbidities. The current treatment for OW/OB is behavioral weight loss …