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dizygotic
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dizygotic
dizygotic, a. Biol. (daɪzaɪˈgɒtɪk) [f. di-2 + zygote + -ic.] Of twins: derived from two separate ova (and therefore not identical).1930 Nature 15 Nov. 766 Dizygotic twins are..on the whole inferior to their brothers and sisters in the physical measurements, but this is certainly not the case with mo...
Oxford English Dictionary
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Zygosity
Monozygotic and dizygotic twins
As discussed above, "zygosity" can be used in the context of a specific genetic locus (example). Fraternal twins are dizygotic because they develop from two separate Oocytes (egg cells) that are fertilized by two separate sperm.
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dizygous
dizygous, a. Biol. (daɪˈzaɪgəs) [f. di-2 + Gr. ζυγ-όν + -ous.] = dizygotic a.1940 Jrnl. Heredity XXXI. 277/1 The comparison of similarities in identical twins with similarities in fraternal or dizygous twins..affords a clue to the rôle played by heredity in producing certain traits. 1950 Race & Sang...
Oxford English Dictionary
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Concordance (genetics)
Studies of twins have shown that genetic traits of monozygotic twins are fully concordant, whereas in dizygotic twins, half of genetic traits are concordant Because a child inherits half of his or her DNA from each parent, parents and children, siblings, and fraternal (dizygotic) twins have a concordance that
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monozygotic
monozygotic, a. (n.) Biol. (mɒnəʊzaɪˈgɒtɪk) [f. mono- + zygote + -ic.] Of twins (also rarely of triplets, etc.): derived from a single ovum (and therefore identical). Also as n., such an individual.1917 H. H. Newman Biol. of Twins 3 Such twins, quadruplets, or larger sets of offspring are known as m...
Oxford English Dictionary
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Twin
Dizygotic (fraternal) twins
Dizygotic (DZ) or fraternal twins (also referred to as "non-identical twins", "dissimilar twins", "biovular twins", and, informally Studies show that there is a genetic proclivity for dizygotic twinning.
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How does the genetic material differ between dizygotic twins and ordinary siblings? I am going to give a rough presentation on twin studies. The terms heritability and concordance are included already, but I struggle ...
Differences in genetic material between dizygotic twins and siblings are likely to be very similar. > Dizygotic twins, or so-called fraternal twins, on the other hand, are no more genetically similar than any other set of siblings. - Utah.edu
Since
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FSHB
Studies show that variations in the FSHB gene can contribute to the likelihood of a woman becoming pregnant with fraternal, or dizygotic, twins.
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Behavioural genetics
Under this simplistic model, if dizygotic twins differ more than monozygotic twins it can only be attributable to genetic influences. When using the Falconer variance decomposition () this difference between monozygotic and dizygotic twin similarity results in an estimated .
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Albalate del Arzobispo
Monuments
This is a beautiful town of Moorish origin, although the remains have been found near dizygotic (s. VI).
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Lee A. Thompson
Thompson co-authored a widely cited twin study on communication disorders which found higher concordance in monozygotic twins than dizygotic twins.
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Prenatal testosterone transfer
When it comes to humans, studies comparing dizygotic opposite-sex and same-sex twins suggest the phenomenon may occur, though the results of these studies Human studies
Studies involving humans often compare opposite-sex to same-sex dizygotic twins.
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Wilhelm Weinberg
Weinberg to statistical genetics included the first estimate of the rate of twinning – Realizing that identical twins would have to be same-sex, while dizygotic twins could be either same or opposite sex, Weinberg derived the formula for estimating the frequency of monozygotic and dizygotic twins from the ratio
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Twins and handedness
Dizygotic Twins and Monozygotic Twins Prevalence for Left Handedness
Unlike monozygotic twins, dizygotic twins result from the fertilization of two eggs However, there was no difference in the handedness frequency between monozygotic and dizygotic twins.
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TwinsUK
As of 2013, the cohort was predominantly female (83%) and middle-aged or older, with about an equal division of monozygotic and dizygotic twins.
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