Twins give birth to two fetuses in one pregnancy, which is called twins. Often called twins. Twins can be divided into identical twins and fraternal twins.
The former is less common among twins than the latter. The DNA in the nucleus of identical twins is exactly the same, that is, after the fertilized egg is divided into two, it will develop into two (or more) individuals respectively; Fraternal twins are the combination of two sperm and two egg cells, so their DNA is different and their sex may be different (so-called twins).
There are two possibilities for twins to appear, one is that the same fertilized egg (identical twins) divides, and the other is that two different eggs (fraternal twins) are fertilized separately. Identical twins generally have the same sex genetic factors, and even look very similar in appearance, so outsiders can't tell them apart.
The sex of fraternal twins may be the same or different, and their appearance and genetic factors are similar to those of other brothers and sisters born at different times. The fraternal twins are almost completely together and have the same living environment after birth, so although they are fraternal, they are still very similar to other brothers and sisters born at different times.
Life is the same:
Many twins have similar life experiences, so some people think that twins have telepathy. However, the experience of a pair of twin brothers in Ohio, USA is amazing.
The twin brothers were adopted by two strange families after their birth, but coincidences happened one after another. After being adopted, both brothers were named Jim, but this was just the beginning of coincidence.
As time went on, both Jim grew up. They were both good at mechanical drawing. They both married a wife named Linda. They both had a son named james allen. At this point, the coincidence is not over. Later, they both divorced their wives and remarried to a woman named Betty. Both families had a pet dog named Troy. Finally, after 39 years of separation, the twins named Jim Lewis and Jim springer were finally reunited.
Baidu Encyclopedia-Twin Brothers (Twins)
Baidu Encyclopedia-Twins (Chinese Vocabulary)