*Sickle cell disease is a constitutional corpuscular hemolytic anemia related to an abnormal structure of the globin chain. It is an autosomal recessive disease, which means homozygosity is necessary to fully express the illness.
*It corresponds to the synthesis of an abnormal hemoglobin, HbS, which is different from normal Hb (HbA).
*The S allele (located in the chromosome 11), responsible for the anomaly, is especially widespread in the African continent, it is also found in other regions of the Mediterranean.
<span>
*Mutation GAG to GTG leading to the substitution Glutamine by a valine in position 6 of the chain of the globine.</span>
Answer: Cellular respiration and photosynthesis are considered a cycle because the product (end material) of one reaction serves as the starting material for the other reaction. The starting material for cellular respiration is sugar and water and the products are carbon dioxide and water.
Explanation: hope it helped
<span>When the pharyngeal tonsil is enlarged, clinicians refer to it as </span>Tonsillitis. It refers to inflammation of the pharyngeal tonsils, It is found at the back of the throat, which can be seen through the mouth. It is usually due to a viral infection or, less commonly, a bacterial infection.
It really can. Just trust me!