Do children born as twins have identical DNA?

Answer 1

There are two types of twins.

Identical twins are created when an sperm and egg cell merged together it splits in two and starts to develop as two foetuses. This type of twins has the same dna as they came from the same original ovum.

Sometimes a woman releases two eggs at the same time and different sperm fertilize each egg. Each egg and sperm contains different dna strands so these babies will not be identical.

They will share some of the same dna, they will be as similar as brothers and sisters are who were not born at the same time.

Answer 2

There are two types of twins - identical twins, created after an egg is fertilised with a sperm and starts to grow, where at some point the cells separate completely, creating two babies; and non-identical twins, created when the woman's body releases two eggs and both are fertilised.

Identical twins will have identical DNA, as the DNA is created when the egg and sperm are combined.

Non-identical twins, therefore, will have slightly different DNA as they have each come from a different egg and different sperm resulting in different DNA combinations.

Answer 3

There are 2 types of twin: Monozygotic twins - where both of them come from the same zygote (fertilised egg). These twins have the same DNA and are also called identical twins. The other type is dizygotic twins, where the DNA isn't identical.

Answer 4

Very definitely YES. Just watched a show on, I believe, 20-20 about identical twins. One egg is split into two, therefore the both have the exact DNA.

Answer 5

Yes they do, there is a story in the paper today of a girl who is shagging twin brothers, and she said she was worried about getting pregnant as she wouldnt know who the father was cos the dna was identical.

I dont think its identical in fraternal twins though.

Answer 6

yes they do have the same dna as im a twin, you will also find that there finger prints are the same in a way, they are just a mirror imge in other words the other way around, but the same pattern (identical twins only )

Answer 7

No, and the following is why. Intuitively, you may already discern why it would not artwork as you imagine because an same father and an same mom do not have indentical children. replace the daddy which includes his same twin and the mum which includes her same twin, and also you're dealing with the difficulty of two children from an same mothers and fathers having an same element of kinship. in case you anticipate that the daddy has Aa chromosome, and the mum has Bb, then the youngsters might want to nicely be Ab, AB, aB or ab. Multiply for all 23 pairs of chromosomes. At maximum, cousins of same twin mothers and fathers might want to be as close as brothers and sisters, no extra.

Answer 8

identical twins do have the same DNA the only diffeace is there finger prints

Answer 9

Identical twins occur when a single egg is fertilized to form one zygote (monozygotic) which then divides into two separate embryos.. therefor they have identical DNA

When two eggs are independently fertilized by two different sperm cells, non-identical (dizygotic) twins result..
Dizygotic twins, like any other siblings, have a very small chance of having the exact same chromosome profile

Answer 10

There are two types of twins: fraternal and identical
Fraternal twins result from two different eggs fertilised by two diff sperms. Hence they have different DNA. They also look different and have different behaviors.
Identical twins result when one egg gets fertilised by one sperm and then it divides into two embryos resulting in two individuals. Since the parent egg and sperm were unique, they have exactly same DNA. These twins look exactly the same and have almost same properties.