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Sickle-Cell Anemia is fairly rare but serious; if you think you have thse symptoms, contact a doctor asap.
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True or false The allele for sickle cell anemia is slowly increasing in frequency in the US?
false
What is the death rate of sickle cell world wide compared to the US world wide?
it is a desies
Why does sickle cell anemia persist?
Primarily because of the same reason why any of us still persists, because even those people can reproduce. And it has been proven that people who has sickle cell anemia are immune to malaria.
How many people in the US have sickle cell anemia?
About 70,000 Americans have it. About 2 million carry the gene for it.
Which ethnic group does sickle cell disease affect?
Black people have a genetic predisposition to sickle cell anemia. Recently there has been progress made in curing this horrible disease.
The HbS allele sickle cell occurs at a higher frequency in Africa than it does in the US because?
LOL do your own content companion
Why do sickle cell anemia cause so many problems?
A sickle cell is a malformed red blood cell. It is caused by a mutated gene inherited from one or both parents. If inherited from both parents the red cells are very malformed, causing sickle-cell anaemia. This is a serious illness, causing weakness and shortness of breath and often leading to an early death.Mutations like this are usually steadily removed from the gene pool because those with it tend to have fewer children. The sickle-cell gene remains in the gene pool because those who get it from only one parent have a slightly deformed red-cell. This causes only limited problems for the bearer, and has one large advantage - it makes the red-cell taste nasty to the malaria parasite. In other words, it protects against malaria which is otherwise often fatal.In areas where malaria is endemic it is common to find the sickle cell gene in about 15% of the population. When Africans came to the USA as slaves the gene came with them. However, malaria has never been common in the US, and the percentage of sickle-cell gene in black Americans has decreased steadily.
Are there any US flags with the hammer and sickle?
no
What is the most common lethal genetic disease in US African Americans?
Cystic fibrosis it is characterized by thick mucus in the lungs
What was primarily acting to change the frequency of the sickle-cell allele in the overall U.S. population?
The absence of the selection pressure malaria. Without selection, in the form of the malarial environment, the sickle cell allele will be lost in the overall US population. Even the heterozygous condition is somewhat deleterious and, statistically without malarial selection pressure the allele will be selected out.
Why are tornadoes and thunderstorms so frequent in the US now?
Tornadoes and thunderstorms have always been frequent in the U.S. However, advances in technology such as Doppler radar and cell phones have made it easier to detect and report such events.
Why is frequency of sickle cell allele so much lower in the US than in Africa?
People with sickle cell anemia are resistant to malaria, which increases their ability to survive and produce offspring. This is evolution in action. Since malaria is a bigger problem in Africa than in America, it is more prevalent in Africa. Many black people in America have inherited this gene from their ancestors
