dizygotic twins


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Related to dizygotic twins: fraternal twins, Monozygotic twins

dizygotic twins

[¦dī·zī′gäd·ik ′twinz]
(biology)
Twins derived from two eggs. Also known as fraternal twins.
References in periodicals archive ?
Maternal age related chromosomal anomalies are seen in dizygotic twins.
Moreover, a recent study demonstrated that both dizygotic twins and their mothers are more prone to infection than monozygotic twins, singletons, and their mothers [25].
For the new study, the researchers recruited 78 monozygotic-twin pairs and 27 pairs of dizygotic twins from the registry.
Without differentiating between monozygotic and dizygotic twins, Rabbi Nathanson ruled that the death of twins established a pattern of hereditary disease (ROSNER 1998).
2 per 100,000 births8 with male predominance and higher incidence in identical twins, report indicates a 100-150 times higher incidence in monozygotic twins relative to dizygotic twins or singletons,9 increase in risk with maternal age (less than 20 years and greater than 40 years).
Monozygotic twins should be identical in their genetic makeup across the entire genome, whereas dizygotic twins are not genetically identical.
MAKE TWO Non-identical or dizygotic twins occur when two fertilized eggs are implanted in the uterus wall at the same time.
If the risk for alcoholism, at least in part, results from genetic factors, one would expect monozygotic twins, who have identical genomes, to have a higher concordance rate for alcohol dependence than dizygotic twins, who on average only share one-half of their genomes.
Twin studies conclude a concordance rate of about 70% for monozygotic twins and 30% for dizygotic twins.
Also, RS+ gene is present in approximately 80% of the population, in which are included the monozygotic and, also, dizygotic twins.
Dizygotic twins, in contrast, show a 0 to 10% concordance under the same models (Folstein & Rutter, 1977; Folstein & Rosen-Sheidley, 2001).