monozygotic twins


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Related to monozygotic twins: identical twins

monozygotic twins

[¦män·ō‚zī′gäd·ik ′twinz]
(biology)
Twins which develop from a single fertilized ovum. Also known as identical twins.
References in periodicals archive ?
In 16 of the 27 monozygotic twin pairs participating in the study, one member of the pair had been exposed to cytomegalovirus but the other had not.
So far there have been only theoretical considerations against the experimental finding and dogma that monozygotic twins are genetically fully identical.
Because monozygotic twins are genetically identical, each fetus of a twin pair would be heterozygous at each informative SNP locus.
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.
analysis, as twins share the same mtDNA, and monozygotic twins would share identical nuclear DNA.
3) Moreover, thyroid hemiagenesis has been documented in monozygotic twins, which suggests a genetic component.
Genetics Does Not Explain Everything: Discordance in Monozygotic Twins
leaf extract reduces blood pressure in borderline hypertensive monozygotic twins.
Thus, the hypothesis suggesting that most female monozygotic twins are likely to be discordant in the differential expression of their X-linked genes remains logical and experimentally supported [Singh et al.
Monozygotic twins, also called "identical twins"--about one third of all twins--are genetically identical, while dizygotic twins, also called "fraternal twins"--about two-thirds of all twins--are no more alike genetically than brothers and sisters born at different times.
Smoking, Dietary Betaine, Methionine, and Vitamin D in Monozygotic Twins with Discordant Macular Degeneration: Epigenetic Implications," which appeared in the July 2011 issue of Ophthalmology, is the first study to examine identical twin pairs in which one twin had early age-related macular degeneration (AMD), and the other had late-stage AMD.