Web Results

en.wikipedia.org/wiki/Twin

Twins are two offspring produced by the same pregnancy. Twins can be either monozygotic ("identical"), meaning that they develop ... Female-female— sometimes called sororal twins; Male-male twins—no special name; Malefemale ...

www.verywell.com/boy-girl-identical-twins-2447124

Jun 15, 2017 ... Learn the difference between fraternal and identical twins and how it ... The result is either two male twins, two female twins, or one male and ...

about-twins.com/pregnancy/can-identical-twins-be-male-and-female

Apr 15, 2016 ... Contradictory to popular belief, identical twins can be male and female. However, it is so very rare that twins of different genders are universally ...

wstwinregistry.org/2015/10/01/can-a-malefemale-twin-pair-be-identical-twins

Oct 1, 2015 ... But, as explained here, identical twins do not always look exactly the same. And male/female twins certainly don't look identical!

www.reference.com/science/can-boy-girl-identical-twins-f20c37b6ec0408c1

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 pair.

www.ncbi.nlm.nih.gov/pmc/articles/PMC1012913

Mongoloid twins with 48 chromosomes (AA plus A21XXY). ... of monozygotism in spite of a sexual dimorphism: XY male subject and haploid X neuter subject].

www.twin-pregnancy-and-beyond.com/identical-twins-or-fraternal-twins.html

See photos and learn about identical vs fraternal twins. ... Twins that are male and female and/or have different blood types can easily be determined as fraternal ...

www.twin-pregnancy-and-beyond.com/identical-boy-girl-twins.html

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, ...

www.scientificamerican.com/article/do-genes-influence-whethe

Do genes influence whether someone has twins, either identical or fraternal? ... it is confined to fraternal twinning and females--suggest that the primary cause is an ... If you are male, then marry a woman who fits this description because it ...