There is a kind of heredity called “twins of Yang Wei’s family”. One follows his father and the other follows his mother. The difference in appearance is too big

Every time you see a pair of lovely twins, do you think it’s very wonderful? Twin families are also very enviable. But twins are also learned. Twins are not as like as two peas. Their gender and appearance may be different. On the other hand, twins are divided into identical twins and fraternal twins. There is also a big difference between the two. < / P > < p > many people may not fully understand the difference between identical twins and fraternal twins. Let’s take a look at a pair of fraternal twin sisters first! Recently, there is a group of photos on Weibo, which are the twin daughters of Olympic champion Yang Wei. The two sisters are a pair of fraternal twins. Although they are twins, they are different in appearance and shape. As can be seen from the photos, one of them is like their father, the other is like their mother. In the photo, two little girls are standing together in the same clothes. But it is obvious that they are not the same height. As a younger sister, Lele is much taller than her elder sister Huanhuan. From the aspect of appearance, although the two sisters are similar, it is easy to distinguish them. Because sister Huanhuan looks like father Yang Wei, and her small face is round. Sister Lele is more like her mother, with a sharp face and a little bigger eyes. < / P > < p > netizens left a message under this group of photos: “it’s so cute, it’s amazing.” “It’s really obvious that one is too much like father and the other is too much like mother.” “It’s amazing in his family. Ha ha ha, one of my family is like a mother and the other is like a grandmother.” < / P > < p > this happens to sisters because they are fraternal twins. It’s developed from mother’s two eggs. There is a lot of knowledge about identical twins and fraternal twins! < p > < p > among twins, identical twins account for about 1 / 3 of all twins, and fraternal twins account for about 2 / 3 of all twins. The difference between the two is very big. < / P > < p > identical twins: as the name suggests, the same fertilized egg splits into two cells before it is implanted in the uterus, and then it is implanted in the uterus and grows. Because they split from the same fertilized egg, their genes are almost 100% the same. They will have the same gender, appearance, blood type, physical characteristics, etc. Even some diseases related to genes have the same sensitivity. For example, they may be easily infected with the same bacteria and virus, allergic to the same substance, etc. Conjoined twins, as we know, are usually caused by abnormal division of identical twins. < / P > < p > fraternal twins: fraternal twins are two different fertilized eggs that develop in the mother’s womb. This is because when a woman is ovulating once a month, sometimes for some reason, she discharges two eggs at the same time and fertilizes them at the same time, resulting in two different fertilized eggs. Fraternal twins are developed from two different fertilized eggs with different genes. So the difference between twins may be bigger. Gender and appearance may be different. < / P > < p > twins are twins of a boy and a girl. They are fraternal twins. Their genes are not the same. One is xy and the other is XX, so one is a boy and the other is a girl. And in the development, the twins also have two different placentas, the growth and development are also different. The twins we see as like as two peas are mostly identical twins. < / P > < p > twins are like a kind of fate. Can be conceived together in the mother’s stomach, and then born together, grow up together, and then accompany each other through life. It can be said that life is so wonderful. So twins should cherish their twin brothers and sisters and create happy memories together. And parents should take good care of their children and let them grow up happily! 08/17/2020