twin method


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twin meth·od

a general means of genetic analysis that capitalizes on the fact that whereas twins have the same age and the same intrauterine environment, identical (monozygotic) twins have the same genotype but dizygotic twins are no more alike than sibs and may be of different gender.
References in periodicals archive ?
Three-dimensional assessment of the relative contribution of genetics and environment to various facial parameters with the twin method. Am J Orthod Dentofacial Orthop 2004; 126: 655-65.
First, PC matrix was blended with LDAs in a twin-screw extruder with LDAs content of 10 wt%, named masterbatches (referred to as two-step twin method).
the corresponding standard deviation (SD) which is obtained from descriptive statistics, the SD of transmittance and haze value of one-step method, two-step single method is 2.509 to 4.532% and 0.992 to 3.542%, respectively, while that of two-step twin method is 0.265 to 2.490%.
The fracture surface of PC/SMS/nTi[O.sub.2]-0.4, PC/SMS/ NTi[O.sub.2]-0.6, and PC/SMS/nTi[O.sub.2]-2.0 which were processed by two-step twin method are shown in Fig.
And all the samples were processed by two-step twin method. With the increase of hybrid filler content, the transmittance of the composites is decreased, while the haze is increased.
But the twin method's uncertainty doesn't increase for more distant stars--a nagging problem with parallax-based determinations.
Based on the virtual twin method, the projected yearly incidence of nonvertebral fractures in years 4 and 5 was 2.6% in the virtual twins on placebo compared with 1.3% in the real denosumab-treated group.
Even though 13 bands played this show, only five were worth seeing: Korn, Evanescence, Atreyu, Flyleaf (all of whom played the main stage) and Twin Method on the second stage.
There were no differences in means or variances for the two zygosity groups, thus fulfilling one of the assumptions of the twin method.
Disclosure, the twin method which is used alongside Retrospect, plays a lesser part in Iris Murdoch's novels, as it does in her predecessor, Trollope.
to give a single overall comparison of the [identical-nonidentical] differences in concordance.' Not surprisingly, the seven pre-1940s, mainly German studies (remember what was going on in Germany in the 1930s?) outweigh the later ones, and the authors are left with this gratifying conclusion: "Pooled concordance for [identical] twins was .69 [or 69 percent]; for same-sex [nonidentical] twins it was .33 [or 33 percent], strongly indicative, within the limitations of the data and the twin method, of a substantial genetic component in criminal behavior.' Wilson and Herrnstein would have done well to apply the computer hacker's adage to their statistical method: garbage in, garbage out.
The company has been around, in one form or another, since the very early days of the twin methods of communication which give it its name.