Answers. Best Answer: take the two laces, cross them, put one lace under the cross, pull. take laces again make laces into loop (make an O shape) cross loops put 1 loop under cross, pull, being careful to pull on sides connected to 1st knot, so as not to undo loops. you're done. Source(s):
The two main groups of thalassemia are called alpha and beta. There are four types of alpha thalassemia and three types of beta thalassemia. Alpha thalassemia genes are found in Southeast Asians, blacks, and people originally from the Middle East. The disease affects the red blood cells in two ways. First the body cannot make enough cells with normal hemoglobin.
Similar to other common globin gene disorders (i.e., beta-thalassemia and sickle cell anemia), alpha-thalassemia is prevalent in tropical and subtropical world regions, where malaria was and still is epidemic, and it is thought that carriers of hemoglobinopathies are relatively protected in a malarial environment.lpha-thalassemia is caused most frequently by deletions involving one or both alpha globin genes. The most common deletions remove a single alpha globin gene, resulting in the mild alpha-thalassemia phenotype (- alpha/alpha alpha).