منابع مشابه
Efficiency of human monozygotic twins in studies of blood lipids.
The cost of human experimentation often severely limits the size of experimental groups in studies of human metabolism. In animal studies workers have found that monozygotic (MZ) twins are efficient experimental subjects, because small, within twin-pair differences allow experiments to be done with fewer animals. This communication presents a method of using uniformity trials (all experimental ...
متن کاملpostnatal studies of bats (pipistrellus kuhlii and miniopterus schreibersii) & histomorphology and histochemistry studies of organs and diseases of (neurergus microspilotus and n. kaiseri)
1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...
Preadolescent development: case studies in twins.
The authors studied eight sets of healthy twins, ranging in physical maturity from prepubertal to late pubertal, and their parents, to assess psychological changes in early adolescence. A phase-specific psychosocial regression correlates with the biological onset of puberty. We present preliminary findings related to twinship, parental reactions, and longitudinal development, based on detailed ...
متن کاملSelection strategies for linkage studies using twins.
Genetic linkage analysis for complex diseases offers a major challenge to geneticists. In these complex diseases multiple genetic loci are responsible for the disease and they may vary in the size of their contribution; the effect of any single one of them is likely to be small. In many situations, like in extensive twin registries, trait values have been recorded for a large number of individu...
متن کاملAn overview of human handedness in twins
There has been a long-standing debate on the complex correlation between the development of human hand preference and brain lateralization. Handedness, used as a proxy for cerebral lateralization, is a topic of considerable importance because of its potential to reveal the mechanisms of the underlying pathophysiology of problems related to brain development or cognitive systems. Twin studies, w...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1928
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1537082