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 ...
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
Although discordant karyotypes are known in identical twins, cases involving ...
as DSS/NR0B1, duplication of which can disrupt the male-determining pathway,
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
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
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 ...
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
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
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, ...
Fraternal [dizygotic] twins may be of opposite sexes; monozygotic [identical] ...
For lack of a better description, could there be a sort of hormonal ...