Although there can be the usual resemblance of a family, they cannot be both "identical" twins and different genders.
Fraternal twins are created when 2 separate eggs are fertilized. Identical twins are created when 1 fertilized egg splits into 2. It is impossible for one identical twin to be male and the other female. Identical twins are usually the ones that look exactly alike.
MZ twins are identical twins that share 100% of the same DNA. DZ twins share only 50% of their DNA (fraternal twins). MZ twins are always the same gender, whereas DZ twins can be the same gender or one male and one female. DZM would be the male pairing of DZ twins, DZF is the female pairing, and DZO is when there is a male and a female.
There are two two kinds of twins.Gametic twins - two sperms fuse with two eggs to form gametic twins.In the case of gametic twins, the twins are not identicaland infact there is a chance for one male and another female.Zygotic twins - zygote forms after fertilisation (Fusion of sperm and egg). The zygote divides in to two cell and these two new cells develops in to twins.In the case of zygotic twins, the babies are identicaland both the twins will be males or females.
Cleo's twins were named Cleopatra Selene and Alexander Helios. there was one of each --- a male and a female.
No. Boys and girls are different, so they cannot be "identical" twins. At the cellular level, a female has two "X" chromosomes, while a male has one "X" and one "Y" chromosome.
Naturally never! Artificially maybe and possible.Naturally* Dizygotical (DZ) Twins (Fraternal or Non-Identical Twins): Born under the fertilization of two different eggs that when they grow in the uterus they don't share placenta.These can be:Male-Female DZ Twins (the most common grouping of twins)Female-Female DZ Twins (sometimes called sororal twins)Male-Male DZ Twins* Monozygotical Twins (Identical Twins) Born under the fertilization of one egg and forms on zygote and sperate to form two different embryos. They share the same placenta but not always share the same sac.They can only be of the same sex:Female-Femal MZ TwinsMale-Male MZ Twins (less commen grouping of twins)ArtificallyIt is possiblie that a woman during ovulation gives two eggs insted of one. One of the eggs maybe extracted and planted into an other woman. The both eggs will be artifically fertilized by the same semen. Making this can be possible but only be the identical eggs of one woman and the same seman of a man. In the end the second woman will give birth to one of the twins but that twin won't have her gens.
Yes, if it is one egg that splits after fertilization from one sperm then the two eggs are identical twins.
There is no such thing as paternal or maternal twins. the only type of twins there are is FRAternal, and Identical. Identical twins are the result of one sperm fertilizing one egg and that fertilized embryo splitting apart and forming two fetuses, therefore the children are born identical, and thus must be of the same sex. Fraternal twins are the result of two eggs being fertilized at the same time by two different sperm, and the children will be born different from the other. As a result, they can be male/male, female/female, and female/male. also there is a very slim chance that fraternal twins can have two different fathers, as it can take up to two weeks after having sex for a sperm to fertilize an egg. so if a female has sex with multiple partners, there is a very small chance that the two twins could be from two fathers.
there is no such thing as paternal or maternal twins. the only type of twins there are is fraternal, and Identical. Identical twins are the result of one sperm fertilizing one egg and that fertilized embryo splitting apart and forming two fetuses, therefore the children are born identical, and thus must be of the same sex. Fraternal twins are the result of two eggs being fertilized at the same time by two different sperm, and the children will be born different from the other. As a result, they can be male/male, female/female, or female/male. also there is a very slim chance that fraternal twins can have two different fathers, as it can take up to two weeks after having sex for a sperm to fertilize an egg. so if a female has sex with multiple partners, there is a very small chance that the two twins could be from two fathers. just to clarify... there is no such thing as paternal or maternal twins
I know of two sets of twins, male, where one is straight and the other gay. One set is of identical twins, too. So, in my experience I would say, "not necessarily." On the identical set, the straight one was the first born. It has been my observation that the first born, at least of male identical twins, seems to be the more aggressive one of the two. No scientific basis for any of this - just my observations.
When twins are the result of two eggs being fertilized at the same time (non identical twins) there is some evidence to show that there is a genetic basis for this kind of twins. However, it is only their mother that has any effect on the chances of having non identical twins; there is no known mechanism for a father to cause the release of more than one ovum When twins are the result of the zygote splitting into two embryos (identical twins) then this is considered a random act nobody is responsible.
Yes. Conjoined twins are always identical (monozygotic) twins, and identical twins are always the same sex.There is a theoretical case where identical twins could be opposite genders, when the babies are female but in one of the females, a branch of one X chromosome breaks away; however, I don't believe this has ever been observed.
Identical twins are formed when one fertilized eggs splits. Non-identical twins are formed when two separate eggs are fertilized.
Yes, they have 2 sets of twins, one is fraternal and one is identical. The identical set is John David and Jana.
Responsible is a bit weird, as there's nothing really that can be done about it. But at a push I'd say the woman. Men always release plenty of semen, but women usually only release one egg. Non-identical twins happen when there are two eggs.
With identical twins, a fertilized egg splits in two. With non-identical twins, more than one egg is fertilized.
Twins are not necessarily identical. They can be fraternal as well. Identical twins result when one fertilized egg splits in two. Fraternal twins result from two fertilized eggs.
Identical twins come from one egg and one sperm. Fraternal twins come from two eggs and two sperm.
Identical twins come from the division of one egg.
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.
No. In order for them to be identical they needed to start off as the same cell and divide so at first their DNA is identical meaning they have the same sex. During development slight changes may occur but the sex always stays the same. Boy-girl twins are always two different cells meaning that they are not identical. The term for boy-girl twins is furturnal. You can however have boy-boy twins and girl-girl twins that are not identical and they are also called furternal. So basically, identical twins start off as one cell that divides and furternal are two individual cells. There is polar body twinning, that's when the egg splits before fertilization, and that can cause a male and a female. This is called semi identical twins or half twins. They share 75% of their genetic markers.
Normaly if they are both male you can keep them, but if one is female then she will be killed.
One is called Vivienne (female) One is called Leon (Male)
Just about anyone can have twins. However, when twins "run in the family", it only runs in the FEMALE half of the family. If your mother is a twin who has a mother who is a twin, and you're female, you have a higher chance of having twins yourself. If you're male, it doesn't matter. Only the female can "decide" to have twins or not -- the male is not included in the decision. (By "decision" I mean how the female's body releases her eggs or how the eggs divide.) There are two types of twins. Identical and fraternal. Identical occurs when a single fertilized egg develops into two embryos. Fraternal occurs when two eggs are fertilized. If fraternal twins run in a woman's family there may be a familial tendency to release more than one egg at a time and she may have a greater chance of having twins. Identical twins 'running' in a family is far less common. Many things can influence the likelihood of twins. The most typical being fertility drugs. A woman's age and parity (how many children she has already had) can also affect the likelihood of twins.
Identical twins originate as one fertilized ovum which divides into two identical ova.
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