Contents:
- Medical Video: Do Twins Have the Same DNA? - A Segment of DNA | Genetics and Genealogy
- How can identical twin children be formed?
- Is it true that identical twin DNA is really identical too?
- What does it mean if the DNA is very similar?
Medical Video: Do Twins Have the Same DNA? - A Segment of DNA | Genetics and Genealogy
Not only faces that are similar, identical twins have the same sex, their bodies look similar, and often wear the same clothes. Sometimes if you see it for the first time it's quite difficult to tell which sister is and where his brother is so exactly his face. The many similarities give rise, do identical twins have identical DNA too? Come on, see the full review.
How can identical twin children be formed?
Identical twins are formed from one egg and one same sperm. After conception or fertilization, this cell should develop into one zygote.
In identical twins, after the conception of the egg and sperm which are fused, it divides into two zygotes. Then the two new zygotes grow into two individuals.
Because it comes from one egg and the same sperm, identical twins have the same DNA, from one egg cell to the mother and one sperm to the same father.
DNA (Deoxyribonucleate) consists of chromosomes that contain genetic information. This genetic information determines all the characteristics and characteristics of the body. Starting from the color of hair and eyes, muscle structure, and so forth.
Although identical twins, but apparently identical twins still have differences, right? Even though there are only a few or maybe there are many differences. So this is the question, why do there still differ from one source of genetic information. Actually the DNA is the same or not?
Is it true that identical twin DNA is really identical too?
Reported on the Verywell Fit page, DNA tests on identical twins or monozygotic twins will give 99.99% similar results. Whereas if the twins are not identical or fraternal twins are generally similar around 50-75 percent.
Quoted in the page of the National Human Genome Research Institute, namely a human gene research institute in America, Don Hadley, MS., C.G.C said that identical twins share the exact same DNA during the womb. However, changes can occur after fertilization, so this makes their DNA still different.
Therefore, it can be said that identical twins do not mean having identical DNA too, but the DNA is very similar.
The proof, you can see for yourself there is always a difference between identical twins. That is, DNA that carries their genetic information is not identical. Although the difference is only a little or you might find it difficult to distinguish, but basically there are different things.
For example, fingerprints can be similar but not 100 percent exact. In addition, for example, face shape or hair color. This is all because their DNA is not one hundred percent identical, but very similar.
Environmental factors or diet can also affect the physical condition of identical twins. There are also epigenetic factors that can affect differences in twins as the age of identical twins goes. Epigenetic factors are changes in gene expression in the body because of the response of a particular mechanism that occurs.
So, in the end, even identical twins still have different DNA even if it's only a little.
What does it mean if the DNA is very similar?
Because the DNA is very similar, the identical conditions of identical twins are almost exactly the same. This means that if his sister has a genetic birth defect, chances are that her sister has the same disorder. For example in cases of dyslexia (impaired reading) or schizophrenic mental illness. If one has cancer, the twin is very susceptible to the same cancer.
However, for various diseases which are also influenced by lifestyle factors and dietary patterns, it is possible for only one child to get an illness, while the twin does not.
