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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.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoFraternal Twins. They are born when the mother produces an extra egg and may be no more alike than any other siblings.
The previous poster mentioned "Siamese twins." This is another name for conjoined twins. Conjoined twins are Identical twins who never completely separated in the womb and thus share portions of their body. While modernly they can usually be separated surgically; there are occasions when this is not possible since they share vital organs (like the heart) and one or both would not survive being separated.
Wiki User
∙ 15y agoNo the are not. They have the same genetic make-up, but they have different personalities and characteristics.
Wiki User
∙ 15y agoFraternal twins.
Wiki User
∙ 14y agoDizygotic twins .
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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.
What is the percentage of identical twins?
about 80% because most of the people i no are identical
What is the trait being studied in the heterozygote?
a pair of nonidentical alleles
What is the difference between dizygotic twins and monozygotic twins?
Dizygotic twins develop from two separate ova fertilized by different sperm at roughly the same time, they are also called fraternal twins. Monozygotic twins develop from one zygote that splits apart producing genetically identical zygotes; also called identical twins.
Are female twins that are not identical called Fraternal or Maternal?
Any set of twins that are not identical (whether it's boys or girls or a combination of the two) are fraternal twins.
What are the three types of twins?
There is Identical twins, Nonidentical twins and Conjoined twins.
What is another name for nonidentical twins?
dizygotic
Is there a word for twins who don't look alike?
Nonidentical twins Dizygotic twins (commonly known as fraternal twins, but also referred to as non-identical twins or biovular twins)
How many pairs of twins your there in the world?
10 million identical and 115 nonidentical.
Do most pregnancies start out as twins?
No, most pregnancies do not start out as twins. When the ovaries release two eggs and both are fertilized then will twins be born (fraternal/nonidentical twins). Or a fertilized egg may divide before implantation resulting in identical twins.
How do you get nonidentical twins?
Non-identical twins happen when two eggs are fertilized at the same time. This happens when the mother ovulates twice, so she has two separate eggs that can be fertilized and develop into fetuses.
What are nonidentical twins?
Non-identical twins occur when the mother ovulates and two separate eggs are released and fertilised. This is different to identical twins, they occur when one original egg splits n two and develops in tandem. then yo have sex
What is the Differences between identical and nonidentical twins?
Identical twins are born together, and look exactly alike.Nonidentical twins are born together, but do not look exactly alike.A good example of non identical would be boy and girl twins,
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 twin develop?
Fraternal twins (or nonidentical twins) develop when two separate sperm fertilize two separate eggs. This creates two genetically different (dizygotic) embryos. In this case, the only thing the babies will be sharing (for now) is your uterus (give them some credit — it’s not that big!).
When babies can be called twins?
Yes babies can be called twins. Also when they grow up they"ll still be called twins.
What are 9 twins called?
A set of twins (2 babies) is called twins. Seven sets would still be twins. 7 babies born together (not twins) would be called septuplets.
