I believe that many parents-to-be are most interested in studying during pregnancy, which is the appearance of their children What kind of baby will two completely different people have? Parents-to-be are full of sweet anticipation.
It has been circulated among the people for a long time"Sons are like mothers, daughters are like fathers".said. Is this kind of conclusion based on just a few cases around you reliable?
Although we all know that a large part of a child's appearance is determined by the genes of the parents, which part is most affected by genetics?
What does a dad inherit from his children?
What does a mother inherit from her child?
It's not clear. Today I'm going to talk to you about it!
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The birth of a boy or a girl is not decided by the woman, but the main thingby the sex chromosomes of the male sideDecision. Therefore, it is the husband's fault that he gave birth to a boy and a girl, and don't blame his mother's belly for not being angry.
When it comes to gender, you can't get around chromosomes. In the human germ cell, there are 23 pairs of chromosomes, that is, 46 chromosomes, of which 22 pairs are autosomes, 1 pair is sex chromosomes, the sex chromosomes of females are xx, the sex chromosomes of males are xy, and the germ cells **, 23 pairs of chromosomes become 23 chromosomes.
When the sperm combines with the egg, the chromosomes of the fertilized egg revert to 23 pairs. Eggs contain only one sex chromosome, while sperm can contain either X or Y sex chromosomes, respectively.
So, when a sperm containing an X chromosome combines with an eggThe fertilized egg is type XX, that is, it develops into a female fetus；If a sperm containing the Y chromosome is combined with an eggSubjectThe sperm and egg are XY-type, that is, they develop into a male fetus
In addition to nutritional status, 70% of a child's height is in the hands of parents, and parental genetics is the main factor in determining a child's height, because 35% of the factors that determine height come from the father and 35% from the mother.
If both parents are not tall, it depends on the baby's acquired 30% effort。Therefore, the saying that the father is short and the mother is short is not necessarily correct!
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Character isFatherThe genetics are large. Of course, there is an innate component to the formation of characterBut it's mostly an acquired influence。Comparatively speaking, dad will have more influence than mom. Among them, the role of father's love has a greater impact on daughters.
According to one psychologist, "fathers play an important role in the formation of their daughter's sense of self-esteem, identity, and gentle personality." ”
Another expert suggested that fathers can impart many important lessons and experiences to their daughters in life, enriching their personalities.
There is a certain amount of intelligenceHereditary, at the same timeIt is affected by acquired factors such as environment, nutrition, education, etc
According to scientists' assessments, the influence of heredity on intelligence accounts for about 50%-60%, and in terms of genetics, mothers are smart, and most of the children born are smart, and if it is a boy, it will be even smarter.
The reason for this is that human genes related to intelligence are mainly concentrated inX chromosomeAbove. Females have 2 X chromosomes and males only 1, so mother's intelligence occupies a more important place in heredity.
If it is a boy, then the IQ of the boy comes from the mother, and if it is a girl, the father and mother account for half.
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Who the baby looks more like needs to be analyzed on a case-by-case basis.
Skin tone
Following the natural law of "multiply and average" leaves no choice. If the parents are darker, there will never be children with fair skin; If one side is white and the other is black, most of them will give their children a "neutral" skin tone, and there are also cases where they are more biased towards one side.
Eyes
The shape and size of a child's eyes are inherited from their parents, and large eyes are inherited dominantly compared to small eyes. If one of the parents has big eyes, the child with big eyes is more likely to be bigger.
Double eyelids are dominantly inherited, and it is very likely that a baby born with a single eyelid and a double eyelid will have double eyelids. But both parents have single eyelids, and children in general also have single eyelids.
Eyelashes
Long eyelashes are also dominantly inherited. As long as one parent has long eyelashes, it is very likely that the child will inherit long eyelashes.
Nose
In general, the nose is large and high and the nostrils are wide. If one of the parents has a straight nose, it is very likely that it will be passed on to the child. The inheritance of the nose will continue until adulthood, with a short nose as a child and a tall nose as an adult.
Ears
The shape of the ears is inherited, and large ears are inherited dominantly relative to small ears. As long as one of the parents has big ears, then the child is most likely to have big ears as well.
Jaw
The lower jaw is a dominant inheritance that is not "negotiable". Either parent has a large protruding chin, and the children often have a similar chin without exception, which is a bit bizarre.
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So, from facial features such as eyes, nose, and mouth to body shape features,Children are genetics that inherit various physical elements from their parents at the same time。Since the influence of genetic factors obtained from mom or dad is the same, it is unscientific to say that the opposite sex has more influence.
Therefore, although the saying that "sons are like mothers, daughters are like fathers" is widely circulated, there is no scientific basis, and it is only roughly judged from some of the features shown by the child's face.
Moreover, the world of genes is full of mysteries, how can we sum it up in a sentence or two? Besides, as long as the child is healthy and happy, it's just a matter of time to say who is more