Medically the evaluation by Cynthia Cobb, DNP, APRN, WHNP-BC, FAANP — written by Kathryn Watson on respectable 12, 2021

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Much the what friend look like originates from a mix of her parents’ DNA. Her hair’s texture and color space no exception. Hereditary information that’s embedded in your body creates a formula because that what your hair is going come look choose throughout your lifetime. Various other factors, like nutrition, health and wellness conditions, and hormones, have actually less impact than the DNA that you’re born with.

If both of your parents to be born through curly hair, possibilities are the you’ll it is in born v curly hair, too. Yet there are cases where 2 curly haired parents can produce a kid with straight or wavy hair.

You are watching: Is wavy hair dominant or recessive

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 offers you two curly haired genes and the other parent gives you a pair of straight-haired genes, you’ll be born with curly hair.

Both of your parents provide you two pieces of hereditary information, dubbed alleles, that identify what your hair form will be. The two alleles native your biological father integrate with two alleles from your biological mother, giving you four in all.

Typically, a dominant gene is one that overpowers a recessive gene when two different features are current in one item of DNA. The dominant gene will come to be the clearly shows trait in the person born through both qualities in their DNA. A recessive gene is a item of hereditary information the you can’t see, however that you may carry.

Let’s say that your father has actually curly hair. That doesn’t mean that both that his alleles room for curly hair. Since curly hair is dominant, the may have actually been born with curly hair however carry an allele for straight hair, too.

Let’s additionally say that your mother has straight hair. Perhaps she inherited two alleles for straight hair. That would mean you’ve got three alleles for straight hair, and also only one for curly hair. Friend could really well it is in born with straight hair, or pass the opportunity of having actually straight hair under to your children.

There isn’t necessarily one solitary gene that reasons your hair to become curly. Her hair form is the an outcome of how your parent’s DNA combines, in enhancement to her ethnicity. Studies suggest that world with different genealogical histories have various genes that are responsible for their hair type.

There are some person traits and also health problems that are established only by your mother’s DNA. This are dubbed “Y-linked” factors since they’re passed through the Y chromosome.

There are likewise traits and conditions linked to her father’s DNA. This are dubbed “X-linked” factors due to the fact that they’re passed through the X chromosome. The means your hair watch is no Y-linked or X-linked.

The only exception to this would certainly be if you have a hereditary health problem with symptom that influence the method that your hair appears. In part cases, these genetic health conditions may be linked to a single gene or a solitary mutation in ~ a single gene.

Being born v curly hair doesn’t mean that her hair will have that texture for the remainder of your life.

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Hormonal changes

Hormones deserve to influence your hair follicle structure at various points of your life. Researcher still don’t fully understand all of the scenarios the can reason this to happen.

You may notification that her curly hair becomes thicker, heavier, or less curly during pregnancy, for example. You might see your hair become less curly if that thins the end postpartum. Hormone fluctuations during menopause may additionally cause hair texture to change.


There’s additionally the issue of your immediate environment. Possibly you’ve stayed in a humid climate all of your life however move come the dry, cool mountains. Her hair’s texture might look a small different through the change in altitude, humidity, and even the water you’re using to wash your hair.

Health conditions

Certain health problems can change the means that her hair texture looks, permanently or temporarily. Alopecia can diminish the thickness of your hair, do it show up less wavy. Medications and treatments like chemotherapy have the right to also readjust the look and also feel of her hair.


Finally, there’s the food the you eat and the nutritional supplements the you take. Yes no magic food or vitamin that you deserve to consume that will make your hair watch a certain way. Yet pursuing and also prioritizing your wellness by eat a varied, well-balanced diet and also meeting all of your nutritional needs deserve to make a distinction in how your hair looks.

When you’re at her healthiest, her hair may look shinier, fuller, and much more natural, and your hair’s texture may vary accordingly.

Curly hair is identified by factors you inherit from your organic mother and also your organic father. Yes sir no solitary gene the determines the means that your hair looks. The means your hair looks as soon as you’re born is additionally a clue right into the genetic information you’d pass to her own youngsters if you have actually them.

While your hair texture may vary throughout her life, that doesn’t mean that her DNA has actually changed. Components like hormones, nutrition, and your atmosphere can make your hair fiber appear an ext curly or much less curly throughout your lifetime.


Medically the review by Cynthia Cobb, DNP, APRN, WHNP-BC, FAANP — composed by Kathryn Watson on august 12, 2021