can you have identical twins that are different genders?
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Identical (monozygotic) twins are always of the same sex because they form from a single zygote (fertilized egg) that contains either male (XY) or female (XX) sex chromosomes. ... A set of boy/girl twins: Can only be fraternal (dizygotic), as boy/girl twins cannot be identical (monozygotic)
1202785
Having identical twins is not genetic. On the other hand, fraternal twins can run in families. Genetics can definitely play a role in having fraternal twins.
213533
Identical twins share all of their genes and are always of the same sex. In contrast, fraternal, or dizygotic, twins result from the fertilization of two separate eggs during the same pregnancy. They share half of their genes, just like any other siblings. Fraternal twins can be of the same or different sexes.
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Mirror image: Identical twins are believed to be genetically identical, but one twin can have mutations not shared by the other. Identical twins can be genetically different, which could explain why they do not always share disorders such as schizophrenia or autism, according to a study published in March in PLoS One.
252011
Identical twins share all of their genes and are always of the same sex. In contrast, fraternal, or dizygotic, twins result from the fertilization of two separate eggs during the same pregnancy. They share half of their genes, just like any other siblings.
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It's possible, but unlikely for the skin colors of twins to be very different. Identical twins have to have the same skin color, because they have the exact same genes, they started out as one embryo that split into two. ... From her mother, she gets all genes for white skin.
510383
As fraternal twins originate from separate conceptions, they can either be all boys, girls, or one of each. ... Usually, the chances of fraternal twins being boys, girls, or a combination of both are the same as for any normal babies. Identical twins (Monozygotic), on the other hand, are always of the same gender.
126220
Because these twins come from one zygote, they are also known as monozygotic. Identical twins are the same sex. There are three types of identical twins. About one-third of identical twins split soon after fertilisation and form completely separate twins.
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All pregnant women have the same chance of having identical twins: about 1 in 250. Identical twins do not run in families. ... older mothers are more likely to have non-identical twins because they're more likely to release more than 1 egg during ovulation.
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Non-identical, or dizygotic, twins occur when two separate eggs are fertilised, each by a different sperm, and develop in the womb at the same time. These twins can be the same or different sexes and are no more alike than any brother or sister, despite being born together.
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There's no evidence that identical twins run in families. However, non-identical twins can run in families. A couple is more likely to have twins if there are twins in the woman's family.
278621
Yes, brother and sister can be identical twin or monozygotic twin but in very very rare case. Occasionally, in this rare case, an egg contain three sex chromosome (XXY). ... After monozygotic twins seperate in the womb, either one can have mutations and some cells can end up having slightly different DNA.
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They Can Be Different Genders or the Same Because fraternal twins originate from separate conceptions, they can be boys, girls, or one of each (just like a singleton baby).
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Because identical twins share all of their genes, they can't be of opposite sexes like fraternal twins can. ... But in the semi-identical twins, one set of chromosomes came from the egg, and the second set was made up of chromosomes from two separate sperm, Gabbett told Live Science.
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Yes, it is possible for same-sex fraternal twins to look extremely similar. Like any siblings, fraternal twins are the products of two separately fertilized eggs from the same mother and father. They are genetically as similar as other non-twin siblings.
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​Identical Twins They result from the fertilization of a single egg that splits in two. Identical twins share all of their genes and are always of the same sex. In contrast, fraternal, or dizygotic, twins result from the fertilization of two separate eggs during the same pregnancy.
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The Science of How Women Can Have Twins With 2 Different Fathers. ... Superfecundation twins: When a woman has intercourse with two different men in a short period of time while ovulating, it's possible for both men to impregnate her separately. In this case, two different sperm impregnate two different eggs.