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A genetic disorder is a health problem caused by one or more abnormalities in the genome. It can be caused by a mutation in a single gene (monogenic) or multiple genes (polygenic) or by a chromosomal abnormality. Although polygenic disorders are the most common, the term is mostly used when discussing disorders with a single genetic cause ...
Sickle-cell anemia is an autosomal recessive disorder that affects 1 in 500 African Americans, and is one of the most common blood disorders in the United States. The single replacement of the sixth amino acid in the beta-globin, glutamic acid, with valine results in deformed red blood cells. These sickle-shaped cells cannot carry nearly as ...
OMIM (Online Mendelian Inheritance in Man) [3] is a comprehensive database of human genotype–phenotype links. Many visible human traits that exhibit high heritability were included in the older McKusick's Mendelian Inheritance in Man. Before the discovery of genotyping, they were used as genetic markers in medicolegal practice, including in ...
Antagonistic pleiotropy also provides a framework for understanding why many genetic disorders, even those causing life threatening health impacts (e.g. sickle cell anaemia), are found to be relatively prevalent in populations when, seen through the lens of simple evolutionary processes, they should be observed at very low frequencies due to ...
In essence the HbF inhibits polymerization of HbS. A similar mechanism occurs with persons who have sickle cell trait. Approximately 40% of the hemoglobin is in the HbS form while the rest is in normal HbA form. The HbA form interferes with HbS polymerization. Causes. HPFH can be caused by mutations in the β globin gene cluster, or the γ gene ...
Some of the genetic disorders endemic to the Arab world are: hemoglobinopathy, sickle cell anemia, glucose-6-phosphate dehydrogenase deficiency, and fragile X syndrome (FXS), which is an inherited genetic condition with critical consequences.
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