The sickle cell allele is an example of a co-dominant gene found on chromosome 11. Those who are homozygous for sickled cell disease has a mutation in their DNA causing the third amino acid in the B-globin go from Glu to Val. This blood disorder causes all their hemoglobin to take on a sickle shape. This leads to anemia, infection, pain attacks, stroke, spleen damage, liver damage, slowed growth, delayed puberty and early death. Having sickle cells also makes the blood plasma carry more CO (carbon monoxide) which kills malaria infection (plasmodium). Malaria is caused by protozoan of the genus Plasmodium. Normally infection begins with a bite from an infected mosquito. The parasite travels from the mosquito to your liver, where the parasite begins to reproduce. The parasite leaves the liver and travels to the bloodstream, where it infects red blood cells eventually destroying them which can result in a terrible death. *side note/hint: sickle cell has co-dominant expression*
1. Describe why a harmful trait, such as sickle cell disease, can be preserved in a population.
2. Explain how natural selection causes changes in allele frequencies in a population.
3. Describe how disease can act as a selective pressure in evolution.
We value our customers and so we ensure that what we do is 100% original..
With us you are guaranteed of quality work done by our qualified experts.Your information and everything that you do with us is kept completely confidential.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
The Product ordered is guaranteed to be original. Orders are checked by the most advanced anti-plagiarism software in the market to assure that the Product is 100% original. The Company has a zero tolerance policy for plagiarism.Read more
The Free Revision policy is a courtesy service that the Company provides to help ensure Customer’s total satisfaction with the completed Order. To receive free revision the Company requires that the Customer provide the request within fourteen (14) days from the first completion date and within a period of thirty (30) days for dissertations.Read more
The Company is committed to protect the privacy of the Customer and it will never resell or share any of Customer’s personal information, including credit card data, with any third party. All the online transactions are processed through the secure and reliable online payment systems.Read more
By placing an order with us, you agree to the service we provide. We will endear to do all that it takes to deliver a comprehensive paper as per your requirements. We also count on your cooperation to ensure that we deliver on this mandate.Read more