- Where are people with blue eyes from?
- Why do people have blue eyes?
- What do blue eyes mean genetically?
- Are blue eyes inherited?
- Do blue eyes come from one person?
- Do blue eyes come from mother or father?
- Is red hair a sign of inbreeding?
- When did blonde hair evolve?
- Where did the Germans come from?
- Can a black person have blonde hair?
- How many genes determine hair color?
- Did the Scots come from Ireland?
- Where did brown hair originate from?
Summary: New research shows that people with blue eyes have a single, common ancestor.
Scientists have tracked down a genetic mutation which took place 6,000-10,000 years ago and is the cause of the eye color of all blue-eyed humans alive on the planet today.
Where are people with blue eyes from?
“The mutations responsible for blue eye colour most likely originate from the north-west part of the Black Sea region, where the great agricultural migration of the northern part of Europe took place in the Neolithic periods about 6,000 to 10,000 years ago,” the researchers report in the journal Human Genetics.
Why do people have blue eyes?
All blue-eyed people may have a common ancestor
Eye color depends on the amount of a single type of pigment (called melanin) in the iris of the eye. This genetic switch, located in the gene next to the OCA2 gene, limits the production of melanin in the iris — effectively “diluting” brown eyes to blue.
What do blue eyes mean genetically?
People with blue eyes have a single, common ancestor, according to new research. A team of scientists has tracked down a genetic mutation that leads to blue eyes. If the OCA2 gene had been completely shut down, our hair, eyes and skin would be melanin-less, a condition known as albinism.
Are blue eyes inherited?
Eye color is not an example of a simple genetic trait, and blue eyes are not determined by a recessive allele at one gene. Instead, eye color is determined by variation at several different genes and the interactions between them, and this makes it possible for two blue-eyed parents to have brown-eyed children.
Do blue eyes come from one person?
The same DNA sequence in the region of the OCA2 gene among blue-eyed people suggests they may have a single common ancestor. DNA studies on ancient human remains confirm that light skin, hair and eyes were present at least tens of thousands of years ago on Neanderthals, who lived in Eurasia for 500,000 years.
Do blue eyes come from mother or father?
The laws of genetics state that eye color is inherited as follows: If both parents have blue eyes, the children will have blue eyes. The brown eye form of the eye color gene (or allele) is dominant, whereas the blue eye allele is recessive.
Is red hair a sign of inbreeding?
Red hair is caused by a relatively rare recessive allele (variant of a gene), the expression of which can skip generations. It is not likely to disappear at any time in the foreseeable future.
When did blonde hair evolve?
Evolution of blond hair
Based on a genetic research carried out at three Japanese universities, the date of the genetic mutation that resulted in blond hair in Europe has been isolated to about 11,000 years ago during the last ice age.
Where did the Germans come from?
Although there is little substantial proof, the concept of a German ethnicity is linked to Germanic tribes of antiquity in central Europe. The early Germans originated on the North German Plain as well as southern Scandinavia.
Can a black person have blonde hair?
Melanesians of some islands are one of the few non-European peoples, and the only dark-skinned group of people outside Australia, known to have blond hair. The blonde trait developed via the TYRP1 gene, which is not the same gene that causes blondness in European blonds.
How many genes determine hair color?
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.
Did the Scots come from Ireland?
Scottish Gaelic is a Celtic language with similarities to Irish. Scottish Gaelic comes from Old Irish. It was originally spoken by the Gaels of Dál Riata and the Rhinns of Galloway, later being adopted by the Pictish people of central and eastern Scotland.
Where did brown hair originate from?
Similarly to blond hair, brown hair occurs commonly among Australian Aborigine and Melanesian populations. Dark brown hair is predominant in the Mediterranean parts of Europe, the Middle East, Central Asia, Central Africa and in parts of South Asia.