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The following is a list of genetic disorders and if known, type of mutation and for the chromosome involved. Although the parlance "disease-causing gene" is common, it is the occurrence of an abnormality in the parents that causes the impairment to develop within the child.
Disease gene identification is a process by which scientists identify the mutant genotypes responsible for an inherited genetic disorder. Mutations in these genes can include single nucleotide substitutions, single nucleotide additions/deletions, deletion of the entire gene, and other genetic abnormalities.
Jacobsen syndrome is a rare chromosomal disorder resulting from deletion of genes from chromosome 11 that includes band 11q24.1. It is a congenital disorder. Since the deletion takes place on the q arm of chromosome 11, it is also called 11q terminal deletion disorder. [1] The deletion may range from 5 million to 16 million deleted DNA base ...
Nablus syndrome is under the class of contiguous gene syndromes, which result from a deletion mutation that affects a number of genes located in close proximity on a chromosome. [14] The mutation for Nabulus syndrome is a microdeletion mutation in the long arm of chromosome 8 (8q22.1). [ 15 ]
Autosomal dominant conditions sometimes have reduced penetrance, which means although only one mutated copy is needed, not all individuals who inherit that mutation go on to develop the disease. Examples of this type of disorder are Huntington's disease, [21]: 58 neurofibromatosis type 1, neurofibromatosis type 2, Marfan syndrome, hereditary ...
A contiguous gene syndrome (CGS), also known as a contiguous gene deletion syndrome, is a clinical phenotype caused by a chromosomal abnormality, such as a deletion or duplication that removes several genes lying in close proximity to one another on the chromosome. The combined phenotype of the patient is a combination of what is seen when any ...
Mitochondrial myopathies are diseases caused by mutations related to mitochondria, and thus are generally inherited from the mother with variable expressivity due to heteroplasmy. Kearns–Sayre syndrome; Mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS) Myoclonic epilepsy with ragged red fibers (MERRF)
The smallest single base deletion mutations occur by a single base flipping in the template DNA, followed by template DNA strand slippage, within the DNA polymerase active site. [ 3 ] [ 4 ] [ 5 ] Deletions can be caused by errors in chromosomal crossover during meiosis , which causes several serious genetic diseases .