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.
Human hair comes with all sorts of colors, textures and shapes. Notably, African hair is more coiled and dry; Asian hair is straighter and thicker; and Caucasian hair is somewhere in between with around 45% having straight hair, 40% having wavy hair, and 15% having curly hair.
Caucasian hair can be smooth, wavy or curly.
It's a mutation in the gene that causes curly hair. I am 100% Scottish and I have very curly hair. My sister has even rarer pin straight hair. Roughly 45% of Europeans have curly hair gene even if they don't present curly hair.
Hair type 1A is super-straight. It doesn't even hold a curl! 1A is the rarest hair type. It is usually found on people of Asian descent.
Less than 20% of people have naturally curly hair. The percentage gets even smaller when you consider the scores of guys out there who don't embrace their curls.
This means two things: 1) if a person carries one allele for curly hair and another for straight hair, this person will have curly hair; 2) curly hair is a simple trait and is most likely determined by one single gene.
So where do curls, kinks, and waves come from then? Most evolutionary theorists agree that human ancestry can be traced back to Sub-Saharan Africa about 500,000 years ago, but it also appears in other hot, sunny places.
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).
Yes, only 11% of the population have curly 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.
From genotyping results, European hair shape varies mostly between wavy (46.6%) and straight (40.7%), with some curly hair (12.7%) (n = 2138) [10]. The same study showed that Asian (East and West) hair shape is also mostly straight (46.7%) or wavy (41.3%), with some curly hair (12%) (n = 92).
While no two heads of hair are the same, there are three main classifications of hair type based on race Asian hair, Afro hair and Caucasian hair (which can also be referred to as European hair).
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.
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.
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.
From genotyping results, European hair shape varies mostly between wavy (46.6%) and straight (40.7%), with some curly hair (12.7%) (n = 2138) [10].
Curly hair has a history of being seen as "messy" or "unruly". According to stereotypes and media, "proper" or "attractive" people don't have curly hair. Curly hair is often described as "messy looking", as it's harder to keep tied up and harder to shape into a completely symmetrical style than straight hair.
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.
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.
According to msn.com, only 11 per cent of the world's population has curly hair. And only 4 per cent of the world is blond haired. 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.
In my opinion, curly hair is attractive because it is spontaneous and unpredictable. There is something beautiful about it's independence. Your curls will not conform to societal pressure and they will not acquiesce to any attempts to tame them.
Evolutionary trait
It is known that 45% of European people have straight hair, 40% have wavy hair and 15% have curly hair. They had previously established the heritability of curly hair, finding there was as much as a 90% chance of it being an inherited trait.
Curly hair is determined by factors you inherit from your biological mother and your biological father. There's no single gene that determines the way that your hair looks. The way your hair looks when you're born is also a clue into the genetic information you'd pass to your own children if you have them.
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.