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Identical twins - Simple English Wikipedia, the free encyclopedia


They are always of the same sex, and are monozygotic or MZ twins (mono = one; ... For IVF deliveries, there are nearly 21 pairs of twins for every 1,000. ... to be the same sex, while non-identical ...

Can a boy and a girl be identical twins? | Reference.com


Rarely, a boy and girl may be identical twins. This condition, called Turner Syndrome, afflicts very few pairs of twins. The gender difference occurs when an egg ...

Monozygotic twins of opposite sex. - NCBI


Although discordant karyotypes are known in identical twins, cases involving ... as DSS/NR0B1, duplication of which can disrupt the male-determining pathway,  ...

Boy/Girl Twins: Identical Twins of Different Genders - Verywell


Can boy girl twins be identical? This article examines the issue of identical twins of different genders, and the exception of transgender twins. ... Are Your Twins Identical or Fraternal? ... Identical (monozygotic) twins are always of the same sex because they form from ... After it splits, there are either two males or two females.

Facts About Identical Twins - Multiple Treasures


Any parent of identical twins will tell you - there is no such thing as identical. ... There have been 3 - 5 documented cases of opposite sex identical twins. This can ...

Types of Twins : Identical, Fraternal & Unusual Twinning | Twin ...


Like singleton siblings. they share 50% of their DNA. ... Two-thirds of all twin births result in same sex fraternal twins and one-third are different sex fraternal twins. ... of identical twins and are identical twins with opposite features. that is one will ...

What is it like to have an opposite gender twin? - Quora


I have a twin sister. To answer about being twins of opposite genders, we have always caught ... So, there is more likely chance of getting more girl friends. There is also an equal ... Everything you do in school will be reported to your parents. Every girl you see or .... Why are there so few identical twins of opposite gender?

Why are there so few identical twins of opposite gender? - Quora


Why are there so few identical twins of opposite gender? Genetically identical twins have the ... same DNA, which makes them identical. Therefore, if one embryo has XY (or XX) chromosomes, the other will as well. 130 Views · View Upvotes.

Can a male/female twin pair be identical? | Washington State Twin ...


Oct 1, 2015 ... And male/female twins certainly don't look identical! ... The result can be a MZ twin pair of opposite sexes. ... Second example: There could be a glitch in copying sex chromosomes during the formation of sperm or egg cells, ...

Identical twins of opposite sex? Wha??? - Straight Dope Message Board


Fraternal [dizygotic] twins may be of opposite sexes; monozygotic [identical] ... For lack of a better description, could there be a sort of hormonal ...