http://www.youtube.com/watch?v=cEtl91408eM
Genetic mutation makes those brown eyes blue
Scientists find that blue-eyed individuals have a single, common ancestor
http://www.msnbc.msn.com/id/22934464/
Cystic fibrosis (CF) was first described in Europe in the late 1930s. It was later shown to be surprisingly common with, on average, one in 20 individuals of European origin carrying a CF mutation. It was widely believed to be absent or very rare in Black Africans and was taught as such to generations of medical students. Only a handful of cases were described in African Blacks in a period of over thirty years, although it was well documented among African-Americans. CF was originally thought to be present in the latter because of admixture with individuals of European descent.
Oculocutaneous albinism (OCA) is a rare, genetically inherited condition passed on by both parents to their offspring, resulting in a significant reduction in or absence of pigmentation in the hair, skin, and eyes at birth. Individuals with albinism are very fair-skinned and fair-haired, with (most often) blue eyes that can take on tones of purple or red in bright lighting.
But due to such lack of knowledge as to why their “white skinned†off springs came about, African mothers and fathers became more and more fearful and suspicions and began to separate their growing number of “white skinned†off springs away from the “black skinned†(pigmented) population.
Eventually most of the “white skinned†off springs of “African†mothers and fathers formed several groups and began to migrate northward through Egypt to another area of Africa which is now called Europe, seeking a more hospitable living environment and to escape the intensity of the equatorial hot climate of the great river valleys and great lakes region of Central, Eastern and Southern Africa which was then and still is South of what is now called Egypt.
The “albino†group moved up in the mountainous area during the Ice Age or Glaciations period that lasted thousands of years further isolating themselves from their original parent population in Africa. And by being in such isolated living condition for such a prolonged period they also interbred (within the existing parent groups) thereby creating additional “albino†offspring from “albino†mothers and fathers who were then and still are direct descendents of African mothers and fathers.
A mutation results in a change of the DNA sequence within a gene or chromosome of an organism resulting in the creation of a new character or trait not found in the parental type. There is blonde hair among the black Australian aborigines. That is an example of a mutation. Albinism is a good example of a mutation. Other examples of mutations are blondism or whiteness among monkeys, apes, and chimpanzees.
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Most forms of albinism are the result of the biological inheritance of genetically recessive alleles (genes) passed from both parents of an individual, though some rare forms are inherited from only one parent. There are other genetic mutations which are proven to be associated with albinism. All alterations, however, lead to changes in melanin production in the body.
They also breed like rabbits.
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