Why do africans have so many dominant genes?
812959
A " dominant " gene only means that gene is expressed. Africans have no more dominant genes than anyone else. Are you confusing a dominant gene with a gene for dominance?
522031
Because the two of your parents are heterozygous for the alleles that influence skin color. This meens that they have one allele that makes them black and one allele that makes them white. The allele for black skin is dominant to the allele for white skin, therefor your parents are black. The reason that you are white is that you inherited two alleles for white skin from your parents. If you know your genetics this situation makes perfect sense.
958482
The dominate gene, or trait is stronger than the recessive.\n\nSay your dad has brown eyes. Your mon has green.  (brown is the dominate gene)  You would have more brown in your eyes cause the brown gene is dominate (stronger)\n\nWill
209169
Its all just genetics, the more dominant genes define what colour shape and size of everything about you is.
807141
because indians went over back in the days as slaves, but not stolen slaves like africans but workers enticed by brits by promises of this and that. indians have been in the carribean for a long time, 300 years at least. am sure there was some humping along the way, coz african genes are so dominant you prob cant tell if they were mixed race.
623305
Sickle-cell anemia is encountered almost exclusively in people of African descent, although there are always exceptions.  The reason sickle-cell anemia is so common (compared to other genetic disorders) in certain populations is that carriers of the gene (i.e. people who have only one copy of it) have slightly oddly shaped red blood cells, which don't cause any problems for them but aren't so great for the parasite that causes malaria.  Since carriers are resistant to malaria, the gene that causes sickle-cell is extremely common only within populations from regions where malaria is endemic.  Since malaria is quite prevalent in many regions of Africa, sickle-cell is also prevalent in people whose ancestry traces back to those regions.  Sickle-cell can pop up anywhere, in any population through random mutation (if I remember correctly, it's a single nucleotide mutation), but without malaria to give heterozygous individuals (i.e. carriers) an advantage, it does not become nearly as common as it did in African populations.
1177562
you're asking this question because the darker-skin pigment genes *do* tend to be dominant or co-dominant. the answer may go back to your father's parentage ... were his recent ancestors all latino? recessive genes can skip generations before showing up.
344293
yes which genes you inherit can go either way. White people can carry recessive black genes and vice versa
1062719
Due to differences of diversity of the human race, and the flora and fauna arond them, some diseases are localized only in certain areas, and due to genetic diveresity over time, people can develop immunities to certain diseases.\n\nFor example, it's been discovered that certain descendants of Scandinavians/Vikings are HIV immune.\n\nIt's for reasons like this that genetic diversity is such a good thing, and why imbreeding is so frowned upon.
99593
Probably because they inbreed
292556
You probably already know this but populations of humans were never separated well (reproductively or geographic isolation) from one another for significant changes to build up.  That said, I'm sure you know of the sickle cell trait that (to my knowledge) evolved at least twice (Africa and the Indian sub-continent).\n\nOne of the more interesting explaination I've found for skin color changes was described in an excellent article in "Scientific American," October 2002.
1118008
Africans are as multivaried as anyone from any other part of the world.  How about short and tall, skinny and fat, dark and light skinned, old and young, kind and mean, loud and quiet, insightful and blind, loving and hating, rich and poor, intelligent and ignorant, and so on.  They're human.
1016741
I am from Africa and I think the answer goes back to the old colonial days where the white man was always the dominant colour.Black africans still seem to equate the white skin with authority and submission.In the case of the States (I lived there for many years ) I would assume the same principle applies due to the slavery angle
730610
It's called genetics.\n\nCoach
507695
Heredity. You got the genes for that trait from your ancestors.
293753
Your friend is correct. I just studied this in school. Dark hair always dominates light hair. And the allele for green eyes overpowers the allele for blue eyes.
1012291
No, they decend from a different genetic line from Africans or Europeans.  They are genetically isolated to Asia, just as "whites" are genetically isolated to Europe, and "Blacks" are genetically isolated to "Africa" (and wherever they were sold as slaves).