Is Curly Hair Genetic
Curly hair is an autosomal dominant trait.
Is curly hair genetic. Curly hair and straight hair are both beautiful in their own rights and learning to love your genetic traits is important in self acceptance. To understand the phenomenon of curly hair we must try to understand much better how genes work. An autosomal dominant trait is one wherein one of the parents father or mother has a mutated and dominant gene while the other doesn t.
The genetics bit. Naturally we decided to call on some scientists to literally get to the root of this issue. Is there a curly hair gene.
Curly hair traits are straightforward if rather tedious to measure given that hair is easily sampled and good methods to quantify curl have been developed. Genetic factors appear to play a major role in determining hair texture straight wavy or curly and the thickness of individual strands of hair. Resources genetics home reference the tech interactive science abc.
Of course genetics is always more complex than the traditional sorts of theories. What we completely ignore is the fact. Curly hair is what they call an autosomal dominant trait.
3 this has aided genetic studies so called genomewide association studies gwas to try to identify the causative genes for hair traits and to explain their role in hair shape. Likewise the alleles for curly hair are not the same in africa and europe. The straight hair in caucasians is likely caused by a mutation in the tchh gene while that in east asians by mutations in the edar and the fgfr2 genes.
For example straight hair in asian countries is caused by two genes and their respective alleles but these genes are different from the ones for straight haired europeans. It may seem like a minor distinction but from a genetic point of view the difference is critical. One way for the couple you describe to have a straight haired child is if the curly headed parent actually has wavy instead of curly hair.
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