Literature DB >> 11545537

Heritability estimates of intelligence in twins: effect of chorion type.

N Jacobs1, S Van Gestel, C Derom, E Thiery, P Vernon, R Derom, R Vlietinck.   

Abstract

This study investigates the basic assumption of homogeneity of monozygotic (MZ) twins: are there differences according to the timing of the zygotic splitting, early in dichorionic (DC) and later in monochorionic (MC) pairs? We assessed the IQ of 451 same-sexed twin pairs of known zygosity and chorion type with the Wechsler Intelligence Scale for Children-Revised (WISC-R). The variances of within-pair differences were compared for monochorionic (MC), dichorionic monozygotic (DC-MZ) and dizygotic same-sexed (DZ) twins and structural equation modeling was applied. High heritability estimates were found for almost all subscales and IQ-scores. A significant effect of chorion type was found: the MC twins resembled each other more than the DC-MZ twins on the subscales Arithmetic and Vocabulary. The effect accounts for respectively 14% and 10% of the total variance.

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Mesh：

Year:  2001        PMID： 11545537     DOI： 10.1023/a:1010257512183

Source DB:  PubMed          Journal:  Behav Genet        ISSN： 0001-8244            Impact factor:   2.805


  10 in total

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6.  FADS2 Genetic Variance in Combination with Fatty Acid Intake Might Alter Composition of the Fatty Acids in Brain.

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7.  Genome-wide DNA methylation and gene expression analyses of monozygotic twins discordant for intelligence levels.

Authors:  Chih-Chieh Yu; Mari Furukawa; Kazuhiro Kobayashi; Chizuru Shikishima; Pei-Chieng Cha; Jun Sese; Hiroko Sugawara; Kazuya Iwamoto; Tadafumi Kato; Juko Ando; Tatsushi Toda
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8.  Obstetric complications and intelligence in patients on the schizophrenia-bipolar spectrum and healthy participants.

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9.  Chorionicity and Heritability Estimates from Twin Studies: The Prenatal Environment of Twins and Their Resemblance Across a Large Number of Traits.

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Review 10.  The Prenatal Environment in Twin Studies: A Review on Chorionicity.

Authors:  Kristine Marceau; Minni T B McMaster; Taylor F Smith; Joost G Daams; Catharina E M van Beijsterveldt; Dorret I Boomsma; Valerie S Knopik
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  10 in total

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