Twins are two offspring produced by the same pregnancy. Twins can be either
monozygotic ("identical"), meaning that they develop ... Male–female twins are
the most common result, 50 ...
Identical (monozygotic) twins are always of the same sex because they form from
a single zygote that contains either male (XY) or female (XX) sex chromosomes ...
Rarely, a boy and girl may be identical twins. ... egg and sperm that begin as
males (sharing XY chromosomes) then change to become a male and female
Identical (monozygotic) twins are nearly identical in terms of genetics, so are
almost always the same sex. The exceptions come from very unusual events
Jan 29, 2009 ... My boss says that ameoba seperation causes identical twins, but that they can be
1 male and one female. I told him he's insane. Please help ...
Identical Twins occur when a single egg is fertilized by a single sperm to form ....
rare cases. twins have been born with opposite sexes (one male. one female).
If the aneuploidy were for the X chromosome, one twin might by male (XY or XYY
) while the other would be female (XO). Such male/female "identical twins" have ...
Jul 11, 1999 ... There have been rare reports of male and female "identical twins" (see
references below). Truly, none of the twins is genetically identical as ...
Dec 26, 2012 ... In theory you should get what would be about as close as possible to male/
female identical (monozygotic twins). However, I don't believe it ...
I have identical boy twins and was told the other day that identical boy twins are
... Babycenter.com not an hour ago that idetical male and female twinsDo exist, ...