"A ugly ugly one, a mother's ugly ugly nest"? Don't make excuses for your looks2018-04-26 20:25:50 241 ℃
Every beauty has its own heart. Beautiful facial features and handsome faces are undoubtedly the dream of many people, especially girls. Many people will fully consider this factor in their choice of spouse in hopes of giving birth to a beautiful baby.
Recently, an article on the Internet "The Truth About the Law of Genetic Law: A Ugly Ugly One, Her Mother's Ugly Ugly Nest" The article has attracted the attention of many people!
Does this claim have scientific basis? What is the person's appearance? Today, we will chat with everyone in detail!
First, genetics, that is, related gene decisions.
The effect is obvious. There are many similarities in the appearance of children and parents at any time in life.
A comparison of the facial features of identical twins and fraternal twins revealed that many phenotypes, such as the tip of the nose, Humans, lower jaws, zygomatic bones, etc. are most obviously affected by heredity, and this effect can reach more than 60%. Other parts are less associated with genetic factors.
Another study identified multiple genetic loci associated with facial features, further illustrating the impact of genes on the face The role of
Second, comprehensive effect.
After being affected by a single acceptor gene or a limited number of genes such as blood type (ABO), skin color (yellow or black, etc.) and hair shape (straight or curly), the phenotype of facial features is affected. Multiple gene effects.
On the one hand, little is known about these effector genes, and on the other hand, they understand the characteristics of these genes and their influencing laws. It is impossible to talk about it.
So,The genetic laws of facial features are far more complex than imagined, and the final performance is often the result of the synergy of multiple genes. Therefore, the child's "likeness" of parents is more reflected in certain areas of the face, but not all.
Third, both parents.
Half the genetic material of the offspring comes from the father and the other half from the mother, and the genes are dominant and recessive. Therefore, the facial features of the offspring are affected by both genes on the one hand. On the other hand, it is also related to genes controlling the traits and interactions.
Therefore, there is no direct evidence that the child's appearance is affected only by the genetic factors of the parent's side, that is, the child Like father or mother, there is no absolute rule. We can see in life that the brothers and sisters of the same parent also have differences in facial features and parental similarities.
Fourth, environmental factors.
In addition to genetics, the influence of environmental factors on appearance cannot be ignored.
In life, it can be seen that even if identical twins of genetic material are identical, they (or they) have some differences in facial features. However, this difference is more diferential than twins or conventional siblings. To be much smaller.
Although the current understanding of the effects of this effect is extremely limited, a good living environment and adequate nutrient supply are The influence of facial development is an obvious fact (such as cosmetic surgery operations are not included in this column).
In short, the formation of facial features is a process dominated by genetics, supplemented by the environment, and has complex interactions. At present, the understanding of this process is still relatively limited. It can be affirmed that the appearance of both parents has a great influence on future generations, but the degree of influence and laws cannot be accurately predicted.
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