2007-01-18 13:53:11 · 13 answers · asked by Rocko 3 in Pregnancy & Parenting ➔ Other - Pregnancy & Parenting
No. Conjoined twins are identical twins.
2007-01-18 13:56:23 · answer #1 · answered by Nicole B 5 · 0⤊ 0⤋
Yes, It could happen, but it would be VERY VERY VERY rare... Conjoined twins would have to be identical twins, because it happens when the egg does not seperate all the way. If you read the information below you will find out that there are only 4 sets of identical twins EVER born who were not the same sex. It also says that only one in every 100,000 births are conjoined twins so if you put those odds together you will see how rare it would be for that to happen.
How twins are formed:
Identical twins are caused by one egg being fertilized by one sperm. Sometime after fertilization, the egg splits into two genetically identical halves. Identical twins are always of the same sex (although there has been very rare, as in only about 4 cases, of opposite sex identical because of genetic abnormality). They share 100% of their genes, and are in reality, natural clones.
Fraternal twins are formed when two eggs are released by the mother, and each egg is fertilized by a different sperm. Fraternal twins can be of the same or opposite sex. They share up to 50% of their genes, and are no more alike or different than any two siblings would be. It is also possible for fraternals to be of different races or parentage, or to be conceived at different times, resulting in a large weight difference at birth.
There is a third type of twinning that scientists are looking into, called polar body twinning, or "half identical" twinning. This occurs when the mother's egg splits before fertilization and then each half is then fertilized by a sperm. This may explain why some fraternal twins (such as the Olsen twins) look as alike as some identicals, but it hasn't been proven that it occurs.
Conjoined twins form exactly like identical twins, but at some point during the stage where the single egg splits, the process stops, and the twins develop attached to one another. This occurs in about 1 out of every 100,000 live births, but 60% of conjoined twins are either stillborn or lost in utero.
2007-01-21 16:52:50 · answer #2 · answered by Kimberley 2 · 0⤊ 0⤋
Well it all depends on the mother, I just watched in the womb on the National Geographic channel and I found out that Identical twins can be different sexes, it has to do with the egg having more chromosomes than normal, like 3 xxx and one y and then the egg splits and the xy and the xx are separate, thus identical twins that are boy and girl, so I suppose that they could be different sexes but I am not totally sure on this.
2007-01-18 14:12:42 · answer #3 · answered by WINGS 4 · 1⤊ 0⤋
No-- conjoined twins are identical, because when the egg split in two, it didn't split all the way. So, the babies were born conjoined. Identical twins are always the same gender. Hope I helped!!
2007-01-18 14:02:45 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Nope. Conjoined twins are genetically identical, so the chromosomes determining their sex would also be identical.
2007-01-18 14:11:04 · answer #5 · answered by kiko 3 · 0⤊ 0⤋
No
Cojoined twins happen when identical twins don't separate. This usually happens by 10 weeks. If they don't separate you get cojoined twins.
2007-01-18 14:05:30 · answer #6 · answered by emmandal 4 · 0⤊ 0⤋
No:
This happens where the zygote of identical twins fails to completely separate.
2007-01-18 14:01:17 · answer #7 · answered by Minerva 5 · 0⤊ 0⤋
No. They are essentially identical twins that did not finish separating very early in the womb.
2007-01-18 14:33:29 · answer #8 · answered by Anonymous · 0⤊ 0⤋
no. they are conjoined because they never fully seperated from the same fertilized egg.
2007-01-18 13:57:07 · answer #9 · answered by Mayor McKim 5 · 0⤊ 0⤋
no, they have to be identical twins formed from the same egg
2007-01-18 13:56:59 · answer #10 · answered by epbr123 5 · 0⤊ 0⤋