Hair morphology is one of the more conspicuous features of human variation and is particularly diverse among people of European ancestry, for which around 45% of individuals have straight hair, 40% have wavy hair, and 15% have curly hair.
Yes, only 11% of the population have curly hair.
Type 1A hair is very straight and fine, with no hint of wave or curl. As it is so straight and fine, when the natural oils travel to the ends, it tends to cause it to look like oily hair. It is the rarest hair type and is common among women of Asian descent.
Lots of traits are statistically rare: Left-handedness (just 10 percent of the population!), curly hair (11 percent!), and blond hair (4 percent!), to name a few.
Over 60% of the world's population has curly hair, yet most research to date has clumped hair into three catchall types - African, Asian, and Caucasian.
It has been long established that curly hair is a dominant trait in Caucasians and straight hair is recessive.
Hair morphology is one of the more conspicuous features of human variation and is particularly diverse among people of European ancestry, for which around 45% of individuals have straight hair, 40% have wavy hair, and 15% have curly hair.
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.
Your hair is naturally voluminous
Curls adds volume to your hair effortlessly, and you never have to worry about it being flat, limp and lifeless like those with straight hair. Even on days when you straighten your curls, there is always going to be that little amount of volume that will make others go green with envy.
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).
Curly hair is often associated with a fun-loving, warm hearted and outgoing personality. If you have curly hair you are perceived as being courageous, outspoken, and spontaneous. You are probably someone who likes to challenge perceptions and norms.
In fact, more people prefer curly hair to straight hair. Though beauty is seen differently by everyone, one thing is for sure; curly hair is getting a lot of love lately. In fact, in a survey conducted by StyleCaster, a surprising 58% of guys thought curly hair was sexier than other hair textures.
Out of all the hair types, types 4A, 4B and 4C are the curliest. They tend to form a compacted Z pattern, plus they have a high density that requires creams, gels and custards to hold their shape and reduce volume. Plus, due to the lack of cuticle layers, coily hair also requires extra moisture.
An estimated 65 percent of the U.S. population has curly, coily or wavy hair, with a growing percentage of textured-hair women embracing their natural hair .
According to astrology, those people whose hair are curly from behind their ears, are very lucky. They seldom face any hurdle in their way. People whose hair are curly on the nape are also said to be very lucky. Such hair signifies wealth.
During puberty, the hair follicles can change and cause your hair to become curly. Your hair follicle shape is determined by your genes but curly hair isn't necessarily a dominant gene.
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.
Caucasian hair can be smooth, wavy or curly. Its colorimetry can vary from blond to dark brown. It grows obliquely, and grows about 1.2 centimeters per month. Caucasian hair has an oval shape.
With Caucasians, research shows that “45 percent of European people have straight hair, 40 per cent have wavy hair and 15 per cent have curly hair.” Curly hair is not exclusive to one race and it does not mean you have to be mixed raced to have curly hair. It's actually not rare for Caucasians to have curly hair.
Curly hair has a natural tendency for dryness, much more so than straight hair. This is because the natural oils your scalp produces can travel down the strand of a straight hair much easier than a curly one.
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.
Fragility. Natural curly hair tends to be more fragile than straight hair. Due to the uneven shape of the hair fiber, the hair shaft can have “high spots” where the cuticle is slightly lifted compared to the rest of the hair fiber.
The fact of the matter is that curly hair takes a longer time to grow longer because it grows in a curl, rather than straight down. But curly hair, as well as straight hair, usually grows about 1/2” per month. So with patience, and with a coordinated plan with your hair stylist, you can have longer hair.
So for hair type, CC gives curly, Cs gives wavy and ss gives straight hair. Back to your specific situation. As you can probably tell, the couple you describe could only have wavy haired kids. That is because the curly headed parents, CC, can only contribute a C gene and the straight haired parent, only an s gene.
A general observation across experiments was that straight hair was perceived as younger, healthier, and more attractive than wavy hair and darker shades (medium copper and brown) were perceived more positively than blonde hair.