Can Identical Twins Be Male And Female
Camila Farah
In that case the twin without damage would be phenotypically male and the twin with cais would be phenotypically female with xy sex chromosomes.
This happens when the fertilised egg loses one of the copies of the y chromosome when it is dividing into two embryos in very early development. Humans have 23 pairs of chromosome. However this would likely be exceedingly rare since if i recall correctly de novo mutations most often occur during gametogenesis. In case of fraternal twins they can be either male male twins male female twins or female female twins.
Fraternal twins can be male and female. Can a male female twin pair be mz twins. There has been at least one case of identical twins of opposite genders. They resemble each other.
Twins of different genders are universally accepted as a sound basis for a clinical determination that boy and girl twins are not identical. However fraternal twins are born when two ovum are fertilized by two separate sperm. Can identical twins be male and female. Fraternal twins are two genetically unique individuals as they come from two separate eggs that are fertilized by separate sperm.
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The resulting egg sperm combination can be male or female. In extremely rare cases mz twins that began as a male zygote have developed into a male female twin pair. The result is either two male twins two female twins or one male and one female. The epigenetic factors that can cause identical twins of either sex to look different are discussed in the answer to the question can identical twins look different.
Using that definition the answer is yes. The term mz twins simply means that the twins came from the same zygote. Yes female identical mz twins can appear more different than male identical twins. The identical twins are born from the same zygote that has split and formed two embryos.
Twins who stem from the same fertilized egg are called monozygotic twins.
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