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The follicle cross-section of straight hair is round, so the hair grows evenly into straight hair. In contrast, the cross-section of the hair follicles of curly hair is approximately oval, so the hair that grows will also have a corresponding curvature. This is determined by genotype, and it has nothing to do with foreigners, many of whom have straight hair.
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Whether there is a relationship between hair curls and ancestors and foreigners is a question that involves genetics and the history of human migration. We can do this from the following aspects:
1.Genetics: The degree of curl in hair is largely determined by genes.
Specifically, this is influenced by a combination of factors such as the amount and distribution of melanin in the hair cortex, as well as the structure of the hair medulla. The characteristics of the volume may be derived from some ancestors with specific genetic variants. However, this genetic variant may exist in different ethnic groups, so curly hair does not directly indicate that a person's ancestors are directly related to foreigners.
2.History of Human Migration: According to the study of human genetics, humans originated in Africa and gradually migrated around the world.
In the process, different races and ethnic groups experience a variety of different environments and living conditions, which also leads to their genetic differences. For example, Africans generally have curly hair, while Europeans have relatively straight hair, which may be a characteristic that has evolved over the course of a long history as different races have adapted to their respective environments. Therefore, hair curls may be a trait that was formed during human migration, but it cannot be simply attributed to the relationship between a person's ancestors and foreigners.
In summary, it is not easy to conclude whether the ancestors of people with curly hair are related to foreigners. This question involves complex genetic and human migration histories that require more in-depth research and understanding.
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Why is African hair naturally "curly" and what is the effect? You'll know after reading it.
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Hello, the curl of hair is related to the shape of the hair follicle at the root of the human hair, we Asians or as long as we are born with straight hair, the shape of the hair follicle is round, while the curly hair is oval. And the shape of hair follicles is genetically determined. Europeans and Americans have curly hair, which is the result of long-term selection by nature, the latitude where they live is relatively high, the climate is colder than Asia, and the curly hair is like a quilt in winter, fluffy to keep warm, so after evolution, curly hair is the majority!!
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Why is African hair naturally "curly" and what is the effect? You'll know after reading it.
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Whether a person's hair is straight or curly is primarily determined by genetics. There are many races in the world, especially among the Caucasian race. Similarly, in the Asian race, both males and females will have dominant inheritance of self-curls, and some will also have intergenerational inheritance, and the hair is naturally curly, which is also a genetic variation.
Experts believe that the curling of the hair is related to its keratinization process. Where the hair is curly, it tends to be in an eccentric position in the hair follicle. That is, the root sheath is thick on one side of it and thin on the other.
On this side of the thin root sheath, the keratosis of the trichoderm and cortex cells begins early; Keratinization near the thick root sheath begins later, and the keratinization process hinders the growth rate of the hair. As a result, the early keratinized half is slightly shorter than the other half, resulting in the curl of the hair towards the side of the early keratinization.
The degree of curl of hair depends on the hair follicles, and the shape of the hair follicles depends on the DNA. To put it simply, straight hair follicles grow straight hair, and curly hair follicles grow curly hair. If the hair follicles are evenly structured, the hair roots will grow in a cylindrical shape and become straight when they grow. If the hair follicle is unevenly structured and oval, then the hair will naturally bend when it grows into it.
Curly hair, like other human characteristics, also reflects the evolution that emerged in humans to adapt to their environment. For example, an African with big, thick curly hair. Mainly due to the fact that the normal cortical cells and paracortical cells in the curly hair are different in length and shortness, so that the curl of each hair is unique.
In straight hair, the outer and inner two types of cells may be about the same length.
In fact, it doesn't matter whether the hair is straight or curly, as a part of our body, it should be well cared for, and it is best to respect the original appearance of the hair, and if not, try not to hurt the hair.
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Yes, this is a matter of genetics, and curly hair is like different people have different colors of hair.
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Some people's genes in their bodies carry such a genetic factor, so it is said to be self-rolling.
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Curly hair should be a genetic problem, because the pores on the scalp do not become round.
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Yes, his parents have this problem, he will have it too, and curly hair is a characteristic of their family.
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Yes. Some people are born with genes that determine how curly their hair is.
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It must be a genetic problem, otherwise why would different people look different? Hair is also part of the genes.
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Most of the hair that comes with curls is genetic.
I just have very curly hair. But when I was on the first day of junior high school, I would blow my hair after washing it, and I would blow it very carefully every time, and then use Sassoon vs draping shampoo and conditioner. For about half a year, I just kept hurting my hair. >>>More
Oriental people are less naturally curly hair, if you have a hair like this, you should avoid over-lengthening, can be short to medium hair is the best, on the other hand, you may wish to use styling gel, first apply evenly on the hands, and then homeopathically from the middle of the hair to the end of the hair, so that the hair presents a natural mess, this is also cool.
Well... Each person's face shape and personality have their own hairstyle, and if there is no issue that matches your face shape. Landlord,There's nothing unsightly about the self-volume.,If it's a girl.,It's going to look good if you stay long.。 >>>More
The tap roll can be softened, and the effect is good.
Softening is actually a professional term for softening, which is a hair care method for stiffer hair, and the general effect is obvious. It can make the hair softer, softer and more conformable. >>>More
Yes. Tin foil ironing.
It is a method of hand-adding tin foil to curl iron, so that the hair is in the shape of strands and strands, and the hair is curled at will, free and not messy. At the same time, the hair is lighter and more flowing, full of movement, both stylish and not exaggerated. >>>More