Top Answer
User Avatar
Wiki User
2014-11-20 15:44:21
2014-11-20 15:44:21

The answer to your question may lie in the way that hair-type genes are inherited.

First, a review of some basic genetics stuff. For most genes, you have two copies of each gene that you inherited from your mother and father. For most "traditional" genes, there is a dominant and recessive version. This all has to do with gene expression and phenotype, or what you actually end up looking like. If at least one dominant version of the gene is present, it will be expressed regardless of what the other is. The only way the recessive version will be expressed is if the dominant version isn't present. This holds true for some simple traits like whether earlobes are attached or not, where the free earlobe allele is dominant (noted as "E") and the attached (noted as "e")allele is recessive. So if at least one of your parents had free earlobes (Ee or EE), you'll have free earlobes. EDIT: if both you're parent have free ear lobes you can still get attached ear lobes in the case that there heterozygous dominate. because if both parent are Ee then you have 1/4 chance of getting ee.

So why don't you see your hair-type in your parents or grandparents? Well, hair-type doesn't follow the nice and simple pattern of inheritance. Hair-type follows a type of inheritance pattern known as "incomplete dominance". Like the earlobe gene, there are two versions of the hair-type gene, curly (noted as C) and straight (noted as s). The incomplete dominance refers to the fact that if you have one of each version of the gene, you get a mix of the two or, in this case, wavy hair. So for hair type, CC gives curly, Cs gives wavy and ss gives straight hair.

Without a better family history, all I can tell you is that it is possible that the curly version of the gene was carried by both of you parents as "Cs," or wavy-type. The same could also be true of your parents parents, but beyond that it gets really unlikely that "none of your ancestors" had curly-type hair. Of course, it's also possible that your curly hair might actually be wavy, or wavy-type. Outside the world of genes, wavy and curly are really just in the eye of the beholder.


While some regard curly hair on the head as a "mutation" and straight hair as the "norm" a deeper look might suggest that the opposite is the truth.

Humans are believed to have originated in Africa, and to have spread from there to the rest of the world. If one looks at a typical African native one will see a person with tightly curled black hair, in a typical "Afro" style (if left to grow naturally).

It is suggested this type of hair, black, tightly curled, and "bouffant" is a result of natural selection, which is due to at least 3 reasons, though the weight given to each reason is open to argument.

1. Black hair is good at absorbing Ultra-violet, thus helping to prevent skin cancer on the scalp.

2. The tight almost "brillo pad" effect is good at keeping sun light off the head, to prevent overheating.

3. The natural "weave" of the hair is open, allowing air to circulate, aiding cooling.

It is then further suggested that as these "proto-humans" left Africa and colonized the rest of the world the above 3 reasons to have black, tightly curled hair actually became a disadvantage.

1. The UV levels fell, as did the average temperature. Clothing was worn to keep warm. Humans need UV exposure to produce Vitamin-D. Those with a less protective hair type were better able to produce vitamin-D. There are also theories (unproven) that blond straight hair hanging down is favored in cold countries at it has a "fiber optic" effect, catching sun-light reflected off the snow, and feeding it to the scalp.

2. The "heating" effect of the sun was reduced, less need for "solar insulation."

3. The colder climate favored a hair type that insulated the head from the cold, rather than allowed active cooling, as most heat is lost from the head.

Hence, having straight hair is actually the "mutation," and having curly hair is normal, so at some point ALL of your ancestors had curly hair, afro Style.


Related Questions

it is because the parents each were heterozyous dominant. meaning each of them had a dominant allele and a recessive allele. the dominant allele would be the curly hair, and the recessive allele would be the straight hair. There would be a 1/4 chance that the child would have curly hair, and a 3/4 chance that they would have curly hair. Say that the Curly hair allele was H and the straight hair allele was h. In order for the parents to have curly hair, they would either have to have an HH gamete or an Hh gamete. Seeing as though the child came out with curley hair, both parents would have to have an Hh gamete. In order to find out the probability, you multiply the parents gametes. (Hh)(Hh). This will give you HH, Hh, Hh, hh. seeing has three of the gametes have the dominant allele, this child will have curly hair, and one is a homozygous recessive, so it will turn out with straight hair.

yes because it might be in your generations genes\traits before.I'm curly haired but none of my parents have curly hair : )

Yes it is genetic. however just because one of your ancestors died from it does not mean you'll ever get the tumor. It just means you're more likely to get it. On the other hand just because none of your ancestors got it does not mean you can't get it. very litle is known about the causes of this disease but the chances of you getting it are 3 in 100,000.

There are many but in cases there are none.

None. A curly tail is not a characteristic of any of the pit bull breeds.

No it not genetic-it is caused by a virus that attacks the heart muscle. CHF is not genetic either it has many different causes but none are genetic.

There is no "normal" amount of body hair. Depending on one's genetic makeup & ancestry the amount of body hair can vary between almost none, and a very thick dense amount.

The curly haired woman , i believe, is Keri Russell and the 2 gentlemen are Jack Noseworthy and Jason Wiles. AnswerCarla Gugino who became "karen sisco" but not sure who the other curly haired woman was on the bed.Carla Gugina also starred in the movie "Step Son" with Pauly Shore. The other woman with curly hair is none other than Kerri Russel from the "Felicity" show.

none cause the i thouth the computer was smart

I don't think thier is none

None. All mammals have at least some hair.

None, they have scales!

get some hair if you have none

None. The genetic code is in the nucleic acids, not the polypeptides.

Some scientists believe that they or their ancestors have lived in Europe, though there are none there now.

None. All mammals have some hair, even if it looks like they do not.

No. While hair is made up of dead cells, none of them are from the bloodstream.

None of her head, body, or hair disintegrates.

Sorry, there are none.

1. Tie you hair in a pony tail. 2. Get a few hair bands at the side to pin the rest up. 3. Grab all your hair (with mousse if needed) and literally scrunch it. 4. Secure with a few hair bands so none falls out. 5. Finish with a little hairspray. Tip: Don't use the little hair pins; they will get bigger and you wont be able to slide them anymore. Tip: If you have long hair, you can do it with mousse; when you take it out later, it will look more curly. See the Related Links for a video demonstration of how to put your hair up in a messy bun.

You have 8 great grandparents, each providing 1/8 of your genetic heritage, on average. If your great grandmother was entirely Indian and none of your other great grandparents had any Indian ancestors, then you are 1/8 Indian.

Copyright ยฉ 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.