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They can be. While identical twins always have to be the same gender, fraternal twins usually are not. However this is not always the case. Identical twins occur because they inhabit the same egg. Fraternal twins because two eggs were fertilized at the same time. So fraternal twins could be the same gender, but usually they are of the opposite gender.
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∙ 13y ago
Wiki User
∙ 13y agono because a boy and a girl are two different genders it is impoosible!
Well actually they can. Identical twins are created when one fertilized egg divides in two so even though they are not the same sex, they are still identical.
Wiki User
∙ 8y agoNo. Identical twins have exactly the same genes and chromosomes, because they form from the division of a single fertilized egg. Sex is determined by whether a sperm contains an X or a Y chromosome, so cannot change once the egg is fertilized.
Wiki User
∙ 14y agoNo. Identical also means sex/gender not just how they look.
Wiki User
∙ 15y agoNo. By definition, identical twins are the same sex.
Wiki User
∙ 15y agoAlthough there can be the usual resemblance of a family, they cannot be both "identical" twins and different genders.
Wiki User
∙ 7y agoYes, the sex of the fraternal twins has nothing to do with the fact that they are twins.
Wiki User
∙ 12y agoyes, but it is extremely rare.
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∙ 14y agosure can
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Why are some twins identical and some not?
The reason why some twins are identical and some are not starts in utero. Identical twins occur when one egg is fertilized and it splits to create two embryos. Nonidentical twins come from different fertilized eggs.
How identical twins can be different when they have the same DNA?
Because they separated into separate beings early in the cell division process. After that, a quadrillion factors are involved in the minuscule differences all along the development process. This is how they become different people.
Are identical twins developed from one egg or two?
There are at least three ways to produce twins. One is when the female produces two eggs, both of which are fertilized by the male. This is how fraternal twins are produced. Fraternal twins can be both the same sex or different sexes. Fraternal twins may only bear a slight resemblance to one another, no more than any two siblings might. (Fraternal twins can actually have different biological fathers, because the eggs may be produced a day or two apart.) Another is for the woman to produce one egg which is fertilized by the male, and then the egg divides into two. This is the traditional way that so-called identical twins are produced. Identical twins are always the same sex. (I use the term 'so-called,' because they are actually 'mirror image' twins.) A third way is for the woman to produce one egg, which then divides into two, which are both subsequently fertilized. There is a greater chance that such twins will resemble one another than fraternal twins, and they may be the same or opposite sexes.
Is the DNA in twins the same?
if they share 1 heart then yes they do. but if they have different hearts then they do not
Do identical twins have identical brains?
No they do not. Identical twins have identical DNA structure, and therefore they have very similar cell structure, leading them to have vastly similar organs (same size, health issues, etc.). However, everyone, even identical twins, do not share the exact same organs. Some identical twins get migraines, while the other doesn't. In some cases, one twin will be homosexual and the other heterosexual. In any case, by nature, identical twins do not have identical brains, and by nurture they experience different things, learn different things, and process information in different ways, resulting in the twins having differing opinions, etc. No two brains are exactly alike.
Are paternal twins identical?
I dont think there is such a thing as paternal twins...perhaps you are thinking of fraternal twins. In that case, they are not identical twins, they do not look the same and they can be different sexes.
Was Shakespeare's twins identical?
No. All identical twins are the same sex. Judith and Hamnet were opposite sexes, and so were fraternal twins.
What is the difference btween identical twins and fraternal twins?
Identical twins are the result of a single fertilized embryo splitting in two at an early stage and forming two viable embryos. As such, identical twins have identical DNA. Fraternal twins are the result of two distinct fertilized embryos being viable. As such, they have different DNA. They could even be different sexes.
What is the different between identical twins and franternal twins?
The DNA of identical twins and of clones is, apart from random, environmentally produced mutations, 100% identical. The only difference is that clones are produced on purpose through advanced bioengineering techniques while identical twins happen as an accident of nature. Identical twins are, in a sense, natural clones.
Twins who have different sexes are called?
fraternal
Who are clones fraternal twins or identical twins?
Identical twins, due to the fact that the one fertilized egg splits, have identical DNA. Fraternal twins, since they are from separate eggs, have different DNA.
Can the twins have different sex in the sims life stories?
Yes, you can. My Sims just had their first set of twins and they are different sexes.
Why wont the babies look the same if identical twins have babies with identical twins?
Because the mother identical twins each have a different husband . . . half of his characteristics show up in their babies.
Do identical twins develop from two different eggs that are fertilized by different sperm?
No, fraternal twins do.
Are twins born with different DNA?
Yes EVERYBODY has different DNA even if you are identical twins.
Why Can fraternal twins be different gender but identical twins are always the same gender?
fraternal twins have two different chromosomes
What is the name for twins that look different?
Paternal Non-Identical fraternal twins
