Results 341 to 350 of about 41,814,406 (368)
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Acta geneticae medicae et gemellologiae, 1972
SummaryAlmost one century after Galton's first scientific formulation of the Twin Method, based on the comparison of MZ and DZ twin series, not only twin studies play a fundamental role and the Interzygotic Test is widely applied in human and especially medical genetic research, but new methods have also been worked out, such as the Azygotic Test and ...
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SummaryAlmost one century after Galton's first scientific formulation of the Twin Method, based on the comparison of MZ and DZ twin series, not only twin studies play a fundamental role and the Interzygotic Test is widely applied in human and especially medical genetic research, but new methods have also been worked out, such as the Azygotic Test and ...
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GeneScreen, 2000
AbstractThe classical twin study is the most popular method for assessing the relative contribution of genes and environment to traits in human populations. Critics argue that several assumptions of the twin method are unjustified, and therefore results from twin studies are misleading. Specifically, it has been suggested that twins differ in important
Evans, D, Martin, NG
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AbstractThe classical twin study is the most popular method for assessing the relative contribution of genes and environment to traits in human populations. Critics argue that several assumptions of the twin method are unjustified, and therefore results from twin studies are misleading. Specifically, it has been suggested that twins differ in important
Evans, D, Martin, NG
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Twin Studies in Pharmacogenetics
1978Since Galton introduced the twin method in 1875 to study the nature-nurture problem (Galton, 1875), the use of twins to identify the relative contributions of genetic and environmental factors to phenotypic variation among human beings has experienced marked shifts in popularity as a genetic instrument or tool.
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Twin studies in psychotic disorders
Epidemiologia e Psichiatria Sociale, 2009etiology of major psychoses, particularly schizophrenia and bipolar disorder. Nevertheless, little is known about the nature and extent of the specific genetic contribution to disease liability (Kendler et al., 1993; Danese, 2008). Twin studies can provide crucial insights regarding the etiology of sub-threshold and clinical psychosis, and represent an
BELLANI, Marcella +2 more
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A twin study of human obesity.
Journal of the American Medical Association (JAMA), 1986Height, weight, and body mass index (BMI) were assessed in a sample of 1974 monozygotic and 2097 dizygotic male twin pairs. Concordance rates for different degrees of overweight were twice as high for monozygotic twins as for dizygotic twins.
A. Stunkard, T. Foch, Z. Hrubec
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A Danish Twin Study of Schizophrenia
British Journal of Psychiatry, 1969Previous studies on schizophrenia in twins have quite recently been reviewed in detail by Gottesman and Shields (1966a) and Shields (1968). The indications of concordance in different series are highly diverging, in monozygotic pairs ranging from near unity to zero.
Fischer, Margit +2 more
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A twin study of autism in Denmark, Finland, Iceland, Norway and Sweden.
Journal of Child Psychology and Psychiatry and Allied Disciplines, 1989The Nordic countries were screened for the occurrence of cases of autism with a same-sexed twin under age 25 years. Twenty-one pairs (11 monozygotic and 10 dizygotic) of twins and one set of identical triplets were found and extensively examined.
S. Steffenburg +6 more
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Heritability of the big five personality dimensions and their facets: a twin study.
Journal of Personality, 1996The genetic and environmental etiology of the five-factor model of personality as measured by the revised NEO Personality Inventory (NEO-PI-R) was assessed using 123 pairs of identical twins and 127 pairs of fraternal twins.
K. Jang, John Llvesley, Philip A. Vemon
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Studies on Twins IV. Twinning in Madhya Pradesh
Acta geneticae medicae et gemellologiae, 1970Frequency and inheritance of twinning have been studied from urban and rural parts of Madhya Pradesh. Family data conform to previous findings by other authors, for other countries, that DZ twinning is influenced by the mother's genotype.Of special interest has been a rural family in which a female, herself a cotwin of DZ pair, married twice, each time
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Psychiatry Research, 1997
The role of genetic factors in panic disorder (PD) and sporadic panic attacks (SPAs) was investigated. A total of 120 twins recruited from the general population were interviewed for the presence of anxiety disorders and SPAs. A significantly higher concordance among MZ than DZ twins was found for PD (73% vs. 0%) but not for SPAs (57% vs. 43%).
Perna G +3 more
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The role of genetic factors in panic disorder (PD) and sporadic panic attacks (SPAs) was investigated. A total of 120 twins recruited from the general population were interviewed for the presence of anxiety disorders and SPAs. A significantly higher concordance among MZ than DZ twins was found for PD (73% vs. 0%) but not for SPAs (57% vs. 43%).
Perna G +3 more
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