Are siamees fraternal or identical twins?

Question

Do they have connected umbilical chords?

Answer 1

As far as I understand it they are identical. I'm not sure about but I believe they are separate. I would do some reasearch on con-joined twins and see what you find. There are many different types of conjoined twins depending on where they are connected. There is no standard Lori and Reba are connected at the head, The herrin twins connected in a whole different way, the organs shared by each set are very different. the separation process is also different.

here are the different types of conjoned twins

Diplopagus: Conjoined twins joined equally with near complete body, only sharing a few organs.
Heteropagus: Conjoined twins joined unequal usually resulting in a parasitic twin.
Thoracopagus: Bodies fused in the thorax. The heart is always involved in these cases; when the heart is shared, prospects for a long life, either with or without separation surgery, are poor (35-40% of cases).
Omphalopagus: Joined at the lower chest. The heart is not involved in these cases but the twins often share a liver, digestive system, diaphragm and other organs (34% of cases).
Xiphopagous: bodies fused in the xiphoid cartilage, e.g., Chang and Eng
Pygopagus (iliopagus): Joined, usually back to back, to the buttocks (19% of conjoined twins).
Cephalopagus: Heads fused, bodies separated. These twins generally cannot survive due to severe malformations of the brain. Also known as janiceps (after the two-faced god Janus) or syncephalus.
Cephalothoracopagus: Bodies fused in the head and thorax. In this type of twins, there are two faces facing in opposite directions, or sometimes a single face and an enlarged skull.[1] These twins also generally cannot survive. (Also known as epholothoracopagus or craniothoracopagus.)
Craniopagus: Skulls fused, but bodies separate (2%).
Craniopagus parasiticus: A second bodiless head attached to the head.
Dicephalus: Two heads, one body with two legs and two, three, or four arms (dibrachius, tribrachius or tetrabrachius, respectively.) Abigail and Brittany Hensel, 17-year-old conjoined twins from the United States, are of the dicephalus tribrachius type, with their third arm having been removed while they were very young.
Ischiopagus: Anterior union of the lower half of the body, with spines conjoined at a 180° angle (6% of cases). Or with the spines separate but both the pelvises forming a single big ring which includes two sacrums and two pubic symphyses.
Ischio-omphalopagus: The most well known type of conjoined twins[citation needed]. The Twins are conjoined with spines in a Y-shape. They have four arms and usually two or three legs. These cases can be challenging because the twins often share reproductive and excretory systems.
Parapagus: lateral union of the lower half extending variable distances upward, with the heart sometimes involved (5% of cases).
Diprosopus: One head, with two faces side by side

Answer 2

Siamese twins started out as one egg which began the process of splitting into two separate eggs but never completed the transition. Had it finished, it would have been typical identical twins. Since it didn't completely split, the eggs develop as a still fused unit, which is why they are born conjoined.
No there is usually only one umbilical cord. It supplies the blood for both, which is why many times, one twin is born dead or in severely bad health.
The strange thing about siamese twins (other than their whole birth and existence), is that sometimes they are identical in looks, but other times they look like fraternal twins.

Answer 3

Do they have connected umb. cords? NO! they have separate cords however there in the same sac together they can be either identical and fraternal, that depends on how they were meant to be they could have started identical and that would mean they were one egg that separated,or they can be fraternal meaning two eggs that were fertilized by two different sperm. Conjoined twins somehow link together since they are in the same sac there closer.

Answer 4

ok, first, comparable twins ability one preliminary fertilized egg. not diverse eggs. Fraternal twins are from diverse eggs. there is no assure for twins pending the mum or fathers historic previous of twins interior the family members. the theory that twins pass a technology is this form of usual overused theory. And no, his functionality as a twin will by no ability result what number eggs your ovaries launch. How could it the place you will even question that probability? think of approximately that.

Answer 5

identical twins can end in Siamese
Finally, the zygote may split extremely late, resulting in conjoined twins.

Answer 6

identical

with identical twins, the egg splits in half, and sometimes it doesnt split all the way.
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Answer 7

Identical. They came from one egg, the egg split, but did not split completely, so the babies are conjoined..

Answer 8

They can be either.

(edit): One egg, one sperm then split=identical
Split egg, two different sperm=fraternal

Answer 9

duh identical