can identical twin be male and female?
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In 99.9% of cases boy/girl twins are non-identical. However, in some extremely rare cases resulting from a genetic mutation, identical twins from an egg and sperm which began as male (XY) can develop into a male / female pair. ... The normal genetic make-up of a girl is XX.
88439
Yes! Identical twins came from the same sperm and egg, so they have the same chromosomes and genes. ... So identical twins with identical DNA may have different genes turned on, causing them to look and act differently, and even to develop different diseases such as cancer.
294687
Either of a pair of twins who, as a result of developing from a single fertilized ovum, are alike in all genetic characteristics (including sex) and typically very similar in appearance. ... Identical twins have the same? Blood group and sex.
26135
In the US, 105 non-twin males are born for each 100 non-twin females. However, males are slightly more likely than females to die in the womb. And because the death rate in the womb is higher for twins than for singleton births, female twins are more common than male twins.
1455786
The splitting of the zygote leaves two halves of the zygote, each with the exact same genetic material. Since gender is determined by the sex chromosomes (genetic material), and each new zygote contains identical genetic material, the same chromosomes will program the same sex in each twin.
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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. Fraternal twins can be either two girls, two boys, or one of each.
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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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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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Fraternal twins can be either two girls, two boys, or one of each. These are the possible sex combinations: A set of boy/girl twins: Can only be fraternal (dizygotic), as boy/girl twins cannot be identical (monozygotic)
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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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Identical twins or triplets have the same genetic identity, are always the same sex, and look almost exactly the same. Fraternal multiples develop from separate eggs that are each fertilized by a different sperm.
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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. Fraternal twins start as two seperate embryos, and are as similar as any other siblings.
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Monozygotic twins are genetically nearly identical and they are always the same sex unless there has been a mutation during development.
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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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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). Chromosomes from the father's sperm determine gender: XX for a girl and XY for a boy.
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Do identical twins always have the same hand preference? No! In about 21% of identical (monozygotic or MZ) twin pairs, one twin is right-handed and the other is either left-handed or ambidextrous. Since identical twins share identical genes, this is evidence that handedness is not a totally genetic trait.
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The two identical twins have the exact same pair of chromosomes. This will be true of the other 22 pairs of chromosomes as well. ... As you can tell, they share about half their DNA on each chromosome. On average this will be true of each chromosome they got from you and your sister.