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Mostly because of the chromosomes their parents contributed. They were both formed when one egg with a set of genes split and basically copied itself to form the other zygote.

This explains alike appearances and quirks, but not neccesarily personality.

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Why do scientist use studies of identical twins to learn about human characteristics?

Scientists use studies of identical twins because they share the same genetic makeup. By comparing identical twins with non-identical twins, researchers can separate the effects of genetics from environmental factors in order to understand how traits and characteristics are influenced by both nature and nurture. This can provide valuable insights into the role of genes in shaping human characteristics and behaviors.


A zygote that separates into two clusters of cells insted of just one prduce?

Non identical twins.


What percentage of twins are identical?

Approximately 30 of twins are identical, also known as monozygotic twins.


Do identical twins always share a placenta?

No, identical twins do not always share a placenta. In some cases, identical twins may have separate placentas.


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.

Related Questions

Why wont the babies look the same if identical twins have babies with identical twins?

Because the mother identical twins each have a different husband . . . half of his characteristics show up in their babies.


What is one way in which identical and fraternal similar?

Identical and fraternal twins typically share many similar characteristics


Why do scientist use studies of identical twins to learn about human characteristics?

Scientists use studies of identical twins because they share the same genetic makeup. By comparing identical twins with non-identical twins, researchers can separate the effects of genetics from environmental factors in order to understand how traits and characteristics are influenced by both nature and nurture. This can provide valuable insights into the role of genes in shaping human characteristics and behaviors.


Why identical twins are similar?

If they were not then they would not be called identical twins!


Do identical twins have identical footprints?

No.


What are two horses with identical genes called?

Identical twins. Although horses sometimes have twins I'm not sure if they have identical twins.


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.


How are twins identical?

Twins are identical because they come from the same egg.


Identical copies of DNA?

Identical twins!


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.


A zygote that separates into two clusters of cells insted of just one prduce?

Non identical twins.


Do identical or non-identical twins share a placenta?

do identical or non identical twins share the same placenta