The African hair is generally curly or frizzy, and grows almost parallel to the scalp. It has the slowest growth rate of 0.9 centimeters per month due to its spiral structure which causes it to twist on itself as it grows. African hair has a flattened shape.
Frizzy hair happens when the cuticle layer of your hair is raised, which allows moisture to pass through and swell the strands. But, what is the cuticle layer? The cuticle layer refers to the outermost layer of the hair strand that protects the innermost layers of the hair shaft.
Genetics
The genetic makeup of your hair can cause frizzy hair. Curly hair and wavy hair tend to get a lot more frizzier when compared to straight hair. Your hair type is determined by the shape of your hair follicle. If you have a rounded follicle, your hair grows straight.
Caucasian hair usually appears thicker since it is more difficult to see through the scalp than other ethnic hair types. However, Asian hair is the thickest and coarsest hair of any ethnic group.
The story of human migration and evolution is written in hair DNA. In sub-Saharan Africa, genes favour tight, curly hair. But in east Asia, mutations have led to straighter, thicker hair. In Europe, other mutations brought wavy and straw-coloured hair.
Because hair can be grouped into three different racial groups it can be used to identify if it came from someone of European, Asian, or African ancestry. As such, hair can be used to exclude people of certain racial group as suspects or as having been at a crime scene.
Caucasian hair can be smooth, wavy or curly.
Hair Curvature
In contrast to African hair that is more flattened and often has twists and turns, Asian hair tends to be round in shape, straight, and more cylindrical. The low values of average curvature in Asian hair suggest a relatively straight hair.
Caucasians have the highest hair density among the ethnicities studied. Black people have the lowest. Asian people have hair density that falls somewhere in between.
Caucasian, Asian and Indian hair samples were put to the test for the World's Best Hair study. Their results put an end to any splitting of hairs over the issue: in terms of health, the Indian hair is the best, topping other ethnic groups on all four counts.
Do some people have naturally frizzy hair? In short: yes. Some people have naturally curly hair, which is drier because the natural oils produced by your scalp can't travel down the hair shaft as well as it can on straight hair.
Frizz occurs due to a lack of moisture in the hair. This causes hair to seek moisture from the air around it, which is why humidity often makes matters worse. In addition to the weather and hair's lack of moisture, there are a number of factors that can leave your hair more vulnerable to frizz.
Meet two girls who live with the real thing. They're two of only about 100 people in the world known to have the genetic condition. Uncombable hair syndrome is characterized by dry, frizzy hair that's “disorderly,” stands out from the scalp and can't be combed flat, according to the National Institutes of Health.
Even for healthy hair, high humidity environments can lead to frizz when your hair absorbs excess moisture where an anti-frizz moisture hair barrier spray can help. Over-styling damaging the hair cuticle and causing frizz. Heat damage and styling is another common culprit of frizzy hair.
Many Asians have naturally straight hair, but there is a significant group of us who do have naturally curly or wavy hair! However, because it's the norm to see straight and sleek hair, curly haired boys and girls tend to think that their hair is some kind of unruly straight hair that isn't behaving.
Curly hair is not certain to a race or ethnicity, it appears all over the world in many forms. White, brown, black and everything inbetween! There is also a scale on which curly hair is classified (2a-4c).
There are racial differences, however, in the incidence of male pattern baldness. The highest rates are found among Caucasians, followed by Afro-Caribbeans. Chinese and Japanese men have the lowest rates. For some unknown reason, this form of hair loss is does not occur among Native Americans.
Africans have the widest and most prominent nose compared to other ethnic groups. Their noses are featured with enlarged nostrils, wide and rounded tips and a lack of protruded nasal bridge. West Africans have the widest noses (widest nostrils), while north Africans tend to have the smallest wide noses.
Japan, Spain and Sweden are widely known for having people with healthy hair, but there are also other countries like India, France and Russia that are also known for helping people keep their hair natural and not messing with any artificial coloring.
More than 90% of Han Chinese, 70% of Japanese and Thai people, and 60% to 90% of Native Americans carry the “thick hair" version of the gene. Meanwhile it's almost nonexistent in people of African and European descent. Both age and sex can also affect your hair shaft thickness.
There are plenty of blue-eyed Asians. This probably happens when the traditional blue-eyed allele comes into a family from a (possibly very distant) European ancestor. Blue eyes then resurface in a child generations later if they inherit the allele from both parents.
Curly hair is considered a “dominant” gene trait. Straight hair is considered “recessive.” To put that in simple terms, that means that if one parent gives you a curly-haired gene and the other parent gives you a straight-haired gene, you'll be born with curly hair.
Is Hair Color Inherited from Mother or Father? Hair color comes from both parents through the chromosomes passed onto their child. The 46 chromosomes (23 from each parent) have genes made up of DNA with instructions of what traits a child will inherit. The results can be surprising.
It has been long established that curly hair is a dominant trait in Caucasians and straight hair is recessive.