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 ...
Apr 19, 2016 ... Identical (monozygotic) twins are always of the same sex because they form from
a single zygote that contains either male (XY) or female (XX) ...
However. it is only the female that has any influence on the chances of having
fraternal twins as the male cannot make her release more than one ovum.
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 ...
This can happen when two different males father non-identical twins – resulting
in half-brothers. ... Sperm cells can survive inside a female's body for 4–5 days.
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 ...
Mongoloid twins with 48 chromosomes (AA plus A21XXY). ... of monozygotism in
spite of a sexual dimorphism: XY male subject and haploid X neuter subject].
We studied identical twins with the 46,XY karyotype - a male with mixed gonadal
dysgenesis and a female with "pure" gonadal dysgenesis.
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, ...