Yes, two curly-haired parents can have a straight-haired child because hair texture is complex, controlled by multiple genes, and even dominant curly genes can hide recessive straight-hair genes, allowing both parents to carry the "straight" trait and pass it on, resulting in a straight-haired child if they inherit two straight-hair alleles.
Assuming there is one gene coding for hair texture, if both curly haired parents carry a recessive straight hair gene, there is a 1/4 chance that a child will have straight hair. Now that's pretty simplified considering were talking genotype vs phenotype and that gets complicated beyond my knowledge.
Hair curl is the outcome of multiple genes interacting with developmental, hormonal, and environmental factors. Having one curly parent raises the chance of curl but does not guarantee it; the specific mix of inherited variants and other influences can produce straight hair in a child of a curly parent.
The rarest hair type is generally considered Type 1A, which is extremely fine, straight, and wispy, lacking any natural bends or waves, making it difficult to hold a curl but naturally sleek and prone to oiliness. While curly hair types (Type 3 & 4) are less common globally, 1A stands out as the least voluminous and textured straight hair, often seen in people of East Asian descent, though it's considered rare across all populations due to its unique fineness.
Hair genes can be inherited from both parents. The genetic contribution for traits like hair color, texture, and other characteristics comes from a combination of genes inherited from both the mother and the father.
Since curly hair is a dominant gene, there is a good likelihood that one or two curly-haired parents will produce a curly-haired cutie. But genetics are tricky, and there's a chance that two parents with curls could carry the straight hair recessive gene, and pass that onto their offspring.
Your biological father can pass on physical traits such as your biological sex, eye color, height, puberty timing, fat distribution, dimples, and even risk factors for certain health conditions.
Around 11% of the global population has naturally curly hair, though the percentage is much higher in certain regions like Africa and Latin America. The shape of the follicle determines curl pattern — the more oval the follicle, the curlier the hair.
In straight type, thin hair was judged most attractive, whereas in wavy type, hair with mean diameter received the highest attractiveness judgments. In conclusion, there was considerable variation in age, health and attractiveness perception of hair with regard to effects of hair diameter, type, and color.
Red hair and blue eyes result from two rare recessive genes—MC1R and a mutation in HERC2/OCA2. Fewer than 0.2% of people have both, making it the rarest genetic combo on Earth.
Curly hair is most common amongst people with African, Mediterranean and Native American ancestry. There's a specific gene that helps shape the hair shaft and determine hair texture, and it's called trichohyalin. Curly hair is caused by a variation in the gene that determines the shape of our hair follicles.
How the hair grows out of the follicle influences the distribution of its proteins. So a straight follicle produces straight hair and a curved follicle produces curly hair. The less evenly distributed the squiggly proteins are, the curlier the hair.
Key Takeaways. As you age, straight hair may become more wavy, and if you have wavy hair, you might see new wave patterns in each section of your head. Over time, those with curly hair may notice looser curls or new curl patterns. If you have coily hair, it's possible for it to become frizzier as you age.
The gene for curly hair in Caucasians
It has been long established that curly hair is a dominant trait in Caucasians and straight hair is recessive.
Curly hair is considered a “dominant” gene trait, meaning if one of your parents had curly hair, they gave you two curly-haired genes, and you're more likely to have curls.
"Rich girl hair" is a hairstyle trend defined by looking effortlessly glamorous, healthy, and expensive, characterized by glossy, silky, and voluminous hair with subtle, natural-looking waves or bends, as if it's always perfectly conditioned and styled without looking overly "done". It's about achieving a polished, "old money" aesthetic with deep, rich colors and a healthy sheen, focusing on perceived ease and impeccable care rather than actual cost.
Type 1A is the rarest hair type and is stick-straight without even a hint of a wave. This type of hair tends to be healthy and glossy, but it's extremely difficult to get it to hold curl or style.
Some men prefer straight hair, others like it curly, and some don't care. While our poll results suggest that guys might have a slight preference for women with straight hair, ultimately, the type of hair a man finds most attractive comes down to his personal tastes.
Individuals of African ancestry, for example, are more likely to have curly hair due to the oval shape of their hair follicles. Additionally, the Keratin Associated Protein (KAP) cluster genes, responsible for the structure of keratin fibers, have been found to have variations in many African populations.
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. You celebrate your uniqueness and value your roots.
In fact, in Brazil, curly hair is celebrated and considered a symbol of beauty. This is probably due to the country's culture and diverse population.
Intelligence genes are situated on the mother's X chromosome. Thus, an intelligent mom has intelligent kids even if their fathers aren't wise. Scientists from the University of Cambridge conducted this study. The 'conditioned genes' behave differently depending on their origin.
Fathers will always pass their X chromosome to their daughters and their Y chromosome to their sons.
Fetal cells also pass through the membrane of the placenta and reach the womb during pregnancy. Male fetal cells have been found in women's blood up to 27 years after delivering a son. Thus, a lady may retain her baby's father's DNA for several decades following childbirth.