Genetic coding- 100% real world or fantasy for literature?

[Megorova]

1 hour ago, Corvo the Crow said:

Skin is alive, hair not so.

Not all hair is "dead". There are active follicles, "dead" - already inactive hairs that doesn't grow longer, and "sleeping" - hairs in follicles, that will grow later. Also even "dead" hair still has melanin in it. If a person has black hair, then even dead hairs will be black. And when hair loses melanin, it becomes grey or white. Whithout melanin even dead hair changes its color, and becomes grey/white.

Also hair is more "alive" than you think. When a person dies, his/her hair (and nails) are still growing for 40 days after death.

1 hour ago, Corvo the Crow said:

Time and again it is told, hair color doesn't work that way. There's no dominant-recessive trait on hair.

There is.

https://en.wikipedia.org/wiki/Human_hair_color

"Two types of pigment give hair its color: eumelanin and pheomelanin.

Pheomelanin colors hair orange and red.

All humans have some pheomelanin in their hair.

Eumelanin, which has two subtypes of black or brown, determines the darkness of the hair color. A low concentration of brown eumelanin results in blond hair, whereas a higher concentration of brown eumelanin results in brown hair. High amounts of black eumelanin result in black hair, while low concentrations result in white hair.

Pheomelanin is more bio-chemically stable than black eumelanin, but less bio-chemically stable than brown eumelanin, so it breaks down more slowly when oxidized. This is why bleach gives darker hair a reddish tinge during the artificial coloring process. As the pheomelanin continues to break down, the hair will gradually become red, then orange, then yellow, and finally white.

The genetics of hair colors are not yet firmly established. According to one theory, at least two gene pairs control human hair color.

One phenotype (brown/blonde) has a dominant brown allele and a recessive blond allele. A person with a brown allele will have brown hair; a person with no brown alleles will be blond. This explains why two brown-haired parents can produce a blond-haired child. However, this can only be possible if both parent are heterozygous in hair color- meaning that both of them have one dominant brown hair allele and one recessive allele for blond hair, but as dominant traits mask recessive ones the parents both have brown hair. The possibility of which trait may appear in an offspring can be determined with a Punnett square.

The other gene pair is a non-red/red pair, where the non-red allele (which suppresses production of pheomelanin) is dominant and the allele for red hair is recessive. A person with two copies of the red-haired allele will have red hair."

 

Also about red hair - all people have pheomelanin (red color melanin) in their bodies, it gives color to lips, etc. But a person will have red hair only if he/she has double R.

But even if a person has Rr or rr, his/her hair will still become red during bleaching.

Though human hair coloring is more complicated than coloring of cat's fur, so sun alone can't bleach dark human hair to the point of becoming reddish, like it happens with fur of dark cats.

2 hours ago, Corvo the Crow said:

Yes and Lann the clever was an Andal, right? Riiight!

Yes, he was.

Why do you think that Andals didn't existed prior their arrival to Westeros? They lived for thousands years prior they left Essos. So some of them did went to Westeros many generations before major Invasion.

2 hours ago, Corvo the Crow said:

I have come to the conclusion that you are just doing this for trolling.

No. I'm doing this to practice English language