In today's society of "beauty is justice", who does not want their children to be able to combine the advantages of both sides and grow into "excellent works" of "white skin, beautiful and long legs"? But genetic inheritance is not controlled by human ideas, and sometimes children are not similar to their parents in terms of portraits, and they are accidentally planted in the pit of "generation-skipping inheritance", which is unbelievable!
The group photo of three generations of grandchildren was ridiculed, netizens: I wanted to have a son, who knew that I had a "father"
After Xiao Wang became a father, he would update his son's dynamics in the circle of friends almost every day. Relatives and friends around me basically witnessed the growth of the little guy through photos, from the soft and cute "small ball" to the facial features.
One day, Xiao Wang posted a group photo of three generations of his grandchildren, and for a time the entire circle of friends was sensational. In the photo, although the little guy is not very similar to Xiao Wang's biological father, he is completely printed in a mold with his grandfather, which is completely similar. Familiar friends can't help but leave a message to ridicule: You originally planned to have a son, accidentally gave birth to another "daddy" rhythm!
Xiao Wang also interacted with his friends humorously, and he couldn't help but complain: just because of the similarity between the grandfather and grandson, the old man loved the little guy "boundlessly". Occasionally the son made a mistake, and before he could teach a lesson with a straight face, the old man took the lead in defending it, treating his own son as an outsider, and the situation was completely "the common camp of the two grandchildren" that could not be violated by anyone.
In real life, the phenomenon of generational inheritance is not uncommon, and the characteristics of grandparents and grandparents are not shown in their children, but they are vividly reflected in the next generation. From a scientific point of view, the emergence of "generation-skipping inheritance" is because of the new arrangement and combination of genes, and the recessive genes that were originally "hidden" in the parents' bodies have become dominant genes in the baby, so it is not surprising that the similarity of grandchildren is high.
So what genes are prone to "generational inheritance"? Let's take a look!
1. Skin color
According to the conventional laws of genetics, the child's skin color is the principle of "parents' skin color multiplied and then averaged", generally speaking, if one of the spouses has a white skin color and one has a dark skin color, then the child's skin color is mostly neutral. But there are exceptions to everything, skin color is controlled by 2-3 pairs of genes, so even if the parents' skin is relatively dark, but the grandmother's skin is white, it may also inherit this trait to the child.
2. Height
The congenital factor of height is inherited by the genes of the parents, generally speaking, the parents are tall, the hope of the child growing tall is greater, the parents are short, and the probability of the child being short will be higher. But in real life, there are many children whose height has successfully counterattacked. Tracing the reasons, part of the reason is that the child's acquired nutrition can keep up and develop well, and the other part of the reason is affected by the inheritance of generations. Usually children who are in a counterattack in height have a relatively tall grandparent or grandparent in the next generation.
Third, obesity
"Eat more, exercise less" will gain weight, which is our habitual cognition. As everyone knows, the trait of obesity is also affected by genes, if the husband and wife belong to the "rich" family, then the probability of children gaining weight is relatively large.
Not only that, if one of the spouses comes from an obese family, just like grandparents and grandparents are also "rich" body shape, then the probability of the child gaining weight will double. Therefore, for the sake of children's health, families with obesity genes must pay attention to the weight of their children and carry out scientific diet control in advance to avoid excessive weight of children.
4. Disease
In addition to appearance and body shape, diseases are also affected by "generation-skipping inheritance". Especially for some genetic diseases, because of the difference between "dominant and recessive" genes, there is a phenomenon of "passing on male to female". Although the mother does not develop the disease, the body carries the disease-causing gene, and it is likely that the disease will be passed on to the son when the next generation is conceived.
Therefore, in today's "eugenics and eugenics", both husband and wife must do a comprehensive physical examination when they are preparing to become pregnant, and clearly understand the family genetic disease history of both parties. For example, diseases such as red-green blindness and epilepsy are high incidence inherited from generations.
From a biological point of view, although genes are inherited from both parents from the beginning of the fertilized egg, it does not mean that in the stage of growth and development, "genes are all arranged by fate". Some bad living habits, such as long-term smoking, alcoholism, etc., will accumulate a large number of toxins in the body, which will not only affect their own health, but also lead to genetic changes in the next generation, and inherit the genes with diseases.
It should also be reminded that drugs, radiation, etc. are also the root causes of genetic mutation. Female compatriots who have a pregnancy plan, or are conceiving, do not take medicine indiscriminately, follow the doctor's advice, do a good job of pre-pregnancy and prenatal examinations, and welcome the arrival of new life with a scientific attitude.
Finally, I wish all parents all over the world a healthy and beautiful baby!