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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.
Wiki User
∙ 15y ago
Wiki User
∙ 9y agoMonozygotic twins (identical twins) are formed when a single sperm has fertilised an egg which splits into two, and each half develops into twins. Non-identical twins are when two eggs are fertilised by two separate sperm, and they only share the uterus.
Wiki User
∙ 11y agoThey sometime twins have different chromosome from there parent.
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Why are identical twins identical and fraternal twins are not?
Identical twins are formed from a single egg that splits into two. Fraternal twins are formed from two separate eggs that are both separately fertilized. So identical twins have identical DNA, and fraternal twins 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.
Why are identical twins always the same gender?
fraternal twins have two different chromosomes
Are felisha and fallon king from cherish identical or fraternal twins?
Yes they are identical twins
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
What are two horses with identical genes called?
Identical twins. Although horses sometimes have twins I'm not sure if they have identical twins.
Why identical twins are similar?
If they were not then they would not be called identical twins!
Why are identical twins identical and fraternal twins are not?
Identical twins are formed from a single egg that splits into two. Fraternal twins are formed from two separate eggs that are both separately fertilized. So identical twins have identical DNA, and fraternal twins do not.
How are twins identical?
Twins are identical because they come from the same egg.
Why are identical twins and fraternal twins not the exact same?
Identical twins are formed from a single egg that splits into two. Fraternal twins are formed from two separate eggs that are both separately fertilized. So identical twins have identical DNA, and fraternal twins do not.
How do you get identical and non identical twins?
Identical twins are formed when one fertilized eggs splits. Non-identical twins are formed when two separate eggs are fertilized.
If I had identical twins 3 years ago what are my changes of having another set of identical twins?
The same as when you had the first set of identical twins.
Do identical twins have identical footprints?
No.
What are the chances of identical twins?
the chances of having identical twins are about 1 in 300.
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.
Why are identical twins always the same gender?
fraternal twins have two different chromosomes
If identical twins married identical twins could at least some of their kids look like twins?
Acctually, they're children would not look like twins. But all of their children would look like brothers and sisters.
