What's wrong with children not looking like their parents?

It is a very normal phenomenon for a child not to look like his or her parents. Some parents are very ugly but the children are very beautiful. It does not mean that the child is not your own if he or she does not look like you. As long as the DNA is verified, you can accurately know whether it is your child. Furthermore, one mother gave birth to nine sons, and each of them is different. This also fully proves that the children all look different. Let me give you the specific reasons.

In real life, ordinary people often have only a superficial understanding of kinship relationships. "He doesn't look like his parents, could he be someone else's child?" "I'm type A blood, you're type B, how come our child is type O?" With all these seemingly plausible questions stuck in his mind and some groundless rumors, it's hard to guarantee that he won't drag his wife and children to do a paternity test. In fact, as long as you know more about genetics, you will not make ridiculous jokes.

He doesn't look like his father or his mother. Whose child is this?

If a child does not look like his father or his mother, it does not mean that the child is not his biological child. The inheritance of human characteristics such as appearance, height, personality and intelligence is not only controlled by multiple genes, but also affected by non-genetic environmental factors.

There are two main types of human genetic characteristics: one type is the genetic characteristics determined solely by a pair of alleles, called single gene genetic characteristics, such as blood type, DNA polymorphism, etc. The father and mother each pass on one of their genes to their offspring, forming the child's genotype, which, once formed, will not change.

The other type is complex genetic characteristics, such as a person's height, weight, skin color, IQ, personality, behavior and appearance. These genetic traits are formed by the combined effects of multiple pairs of genes and environmental conditions.

The effect of each pair of genes is tiny, and the combined effect of multiple pairs of genes determines the characteristics of an individual. During meiosis when sperm and eggs mature, the genes located on different chromosomes are randomly combined. Therefore, the genes obtained by siblings can be different, and their appearances may not be exactly the same. In addition, complex genetic characteristics are greatly affected by the environment. For example, height and weight are directly related to acquired factors such as living environment, nutritional status, and living habits; IQ is related to education.

Can “Black Li Kui” give birth to “Snow White”? Yes. Human skin color inheritance is controlled by more than two pairs of genes. The genes for different skin colors have the same effect on offspring, and there is no difference in dominant or recessiveness. So if the father has a darker skin color and the mother has a fair skin color, the child will get a "neutral" skin color. When people of the same race marry, the skin color of their offspring will not be much different. If a white person and a black person marry, the offspring will be gray-black.

If both parents are type A, can their child be type O? Yes. Most people know that the human ABO blood type system has four blood types: O, A, B, and AB. In fact, these four are phenotypes. There are six genotypes: 00, AO, AA, B0, BB and AB. Therefore, the genotype of type A blood may be AA or AO, and the same is true for type B blood.

Because of this, those so-called type A parents may not be AA, but AO. Then when the sperm and egg of both parents carrying type O genetic factors combine, the children will have type O blood. In addition, a person's blood type may not remain unchanged throughout his life. If he suffers from cancer, receives a blood transfusion, takes medicine, or receives radiation therapy, his blood type will undergo short-term changes, but will return to its original state after a period of time.

Children with leukemia or aplastic anemia can permanently change their blood type to that of the donor after receiving a bone marrow transplant. In addition, since humans do not yet fully understand blood types, it has been found that there are very few cases that "violate" the above-mentioned genetic laws.

If you have a short nose when you are a child, is it possible for it to become a high nose when you grow up? Of course it is possible, and this is the interesting thing about nose inheritance. The genetics of your nose continue into adulthood. Of course, if you want to have a straight, tall, narrow nose, both parents must have small nostrils and narrow noses, and at least one of them must have a tall and straight nose. Of course it's possible, and that's what's so interesting about nose genetics. The genetics of your nose continue into adulthood. Of course, if you want to have a straight, tall, narrow nose, both parents must have small nostrils and narrow noses, and at least one of them must have a tall and straight nose.

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