monozygotic twins


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Related to monozygotic twins: identical twins

mon·o·zy·got·ic twins

twins resulting from one zygote that at an early stage of development separated into independently growing cell aggregations giving rise to two individuals of the same sex and identical genetic constitution.

monozygotic twins

two offspring born of the same pregnancy and developed from a single fertilized ovum that splits into equal halves during an early cleavage phase in embryonic development, giving rise to separate fetuses. Such twins are always of the same sex, have the same genetic constitution, possess identical blood groups, and closely resemble each other in physical, psychological, and mental characteristics. Monozygotic twins may have single or separate placentas and membranes, depending on the time during development when division occurs. Monozygotic twinning occurs with relatively uniform frequency in all races, is unaffected by heredity, and represents approximately one third of all twin births. Also called enzygotic twins, identical twins, true twins, uniovular twins. Compare dizygotic twins. See also Siamese twins.
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Monozygotic twins

monozygotic twins

Identical twins Twins resulting from the division of a single fertilized egg, which usually share a common chorion and placenta; usually each has a separate amnion. Cf Fraternal twins.

mon·o·zy·got·ic twins

(mon'ō-zī-got'ik twinz)
Twins resulting from a single zygote that at an early stage of development becomes separated into independently growing cell aggregations giving rise to two individuals of the same sex and identical genetic constitution.
Synonym(s): enzygotic twins, identical twins.

monozygotic twins

twin babies derived from a single fertilized ovum

monozygotic

pertaining to or derived from a single zygote (fertilized ovum); said of twins.

monozygotic twins
see monozygotic twins.
References in periodicals archive ?
The apparent fractional fetal DNA concentration was relatively constant across chromosomes for all sets of monozygotic twins, with SD values ranging from 0.
As shown with our twin pair, monozygotic twins of patients who present with cardiac disease have a high likelihood of developing similar conditions.
Genome, epigenome and RNA sequences of monozygotic twins discordant for multiple sclerosis.
1986) Aerobic performance in brothers, dizygotic and monozygotic twins.
In fact, they found coronary flow rate was significantly lower in dizygotic twins with a history of major depression compared to their fraternal twins without major depression, but there was no significant flow rate difference between monozygotic twins discordant for the disorder.
Thus while individual differences in IQ within similar environments may be attributed to native cognitive dispositions, differences in scores between the populations of qualitatively different environments as in the case of monozygotic twins reared apart, can be logically attributed to different cognitive environments.
Conjoined twins are rare variants of monozygotic twins.
But the methylation patterns in monozygotic twins were more similar than those in fraternal twins, who develop from separate eggs.
Here we present a familial form of VVS in monozygotic twins and their parents.
In studies of male twins, monozygotic twins (single egg) are more likely than are dizygotic twins (two eggs fertilized by two different sperm) to be concordant for homosexuality.