"My daughter is a replica of my husband!"
"This son is exactly the same as his mother, and the boy is really like his mother."
We often hear similar conversations in our daily lives, and the saying that "boys are like dads and girls are like moms" is deeply rooted in people's hearts, and we can find a variety of cases at any time.
For example, Jia Nailiang and Tianxin, Tian Liang and his daughter Cindy, Wang Zulan and his mother, big S and son, etc., it seems that such a phenomenon does exist, and there is a certain scientific truth hidden behind it.
However, if you have a little biological knowledge, you will know that the child's appearance inheritance is controlled by genes, and if you want to understand whether the "boy is like a father, a girl is like a mother" statement is not reliable, you must find the answer from genetic inheritance.
Daughters look like dads, boys look like moms? This statement is not accurate
Genetically, everyone has 23 pairs of chromosomes, including 22 pairs of autosomes, and 1 pair of sex chromosomes X and Y, which carry a variety of genes on the chromosomes, which determine the appearance of a person.
In the initial form of life, when a fertilized egg is formed, the sperm and egg will each carry half of the parent's genes, and finally form the child's genes, in which whether it is a boy or a girl, the mother will give her own X chromosome, the father will give the boy Y, the girl X.
According to this statement, it seems that both boys and girls are more likely to be more like each parent.
The answer is no, and some biologists have found that the X chromosome from the mother carries much more genetic information than the father's Y chromosome (because the father's Y chromosome carries more gene fragments that determine male sex).
So from this point of view, it is true that boys may be more like mothers, but girls are genetically affected by their parents almost the same, and the so-called "daughter looks like dad, boy looks like mom" statement is not accurate.
The appearance of the child will also be affected by the "explicit" nature of the gene
Although we use the theory of genetic inheritance to explain that "daughters look like fathers and boys look like mothers" is not reliable, the genetics of children's appearance are not so simple.
As the saying goes, "the dragon gives birth to the dragon, the phoenix gives birth to the phoenix", because half of the child's genes are inherited from the father, half from the mother, whether boys or girls, they and the parents will always have certain similarities in appearance, but it is not difficult for us to find in life that many girls and mothers look amazing, and the sons look like fathers.
The reason for this phenomenon is mainly due to the "recessive inheritance" of genes.
Among them, dominant inheritance means that as long as there is a dominant gene in a pair of genes, the external shape determined by the gene can be expressed, such as double eyelids, head spin, etc.
Recessive inheritance means that a pair of genes must be recessive at the same time to show the external shape, such as eye size, straight hair curls, etc.
It is precisely because of the characteristics of genetic inheritance, although the child inherits half of the parent's genes, but these genes have a dominant recessive division, if the child inherits more dominant genes from the father, then the child is naturally more like the father, and vice versa, more like the mother.
It is precisely for this reason that not only are girls like fathers and boys are like mothers, but sometimes children also have the physical characteristics of their parents.
For example, Qi Wei's daughter "Lucky", she not only looks extremely similar to her mother's relative Wei, but also inherits her father's double eyelids, and her appearance has the common characteristics of her parents.
Genetic inheritance doesn't determine everything, and acquired factors are equally important
Although the appearance of children is indeed greatly affected by genetic inheritance, acquired environmental factors are equally important, and even identical twins who should theoretically have exactly the same appearance will gradually show obvious differences in appearance as they grow up.
In addition, in addition to the appearance will be affected by the comprehensive influence of genes and the acquired environment at the same time, the child's height, intellectual development, personality characteristics, etc., are also the result of the interaction of a variety of genes and environmental factors.
For example, it has been said that "the son's intelligence is inherited from the mother, and the daughter is inherited from the mother and half of the mother", which is also inaccurate.
Children's intelligence will indeed be affected by the genes of their parents, but only about 50%, while the remaining 50% is affected by many environmental factors such as education, growth environment, and nutritional supplementation level.
Therefore, instead of worrying about whether the child's appearance is like a father or a mother, and the IQ will be more biased towards the parents, it is better to think about how to give the child a better growth environment, which is more important for the healthy growth of the child.
Crooked Mom Conclusion:
Although the saying that "boys are like mothers, girls are like fathers" is widely spread, it is not absolute, and the law of genetic inheritance is not so simple.
Whether it is the child's appearance, or IQ, personality and many other characteristics, are determined by genetic inheritance and acquired factors, we as parents, although we can not determine the child's innate genetic inheritance, but can work the acquired factors to help children become better people.
Today's topic: Do you have the example of "boys like moms, girls like dads"?
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