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Genetic Disorders
Gross Genetic Abnormalities
Term | Definition |
---|---|
Congenital disease | Present at birth. Genetic or not |
Inherited disease | Present at birth or can me manifested later in life. Genetic defect |
Polygenic genetic disorder | Associated with several genes |
Mendelian | Associated with mutation of only one gene |
Aberration | Disorder in the number or structure of chromosomes |
Trisomy | Term used when there are 3 rater than the normal 2 chromosomes |
Trisomy 21 | Down's Syndrome. Oral manifestations: fissured tongue, macroglossia, premature loss of teeth, Taurodontia |
Turner's Syndrome | Only 1 X chromosome. Female phenotype. Oral manifestations: failure of teeth to develop normally, abnormally high palate |
Phenotype | Observable appearance of genotype |
Genotype | Genetic composition |
Klienfelter's Syndrome | Boy born with extra copy of the X chromosome. Male phenotype. Oral manifestations: taurodont teeth |
Taurodont | Teeth appear radiographically to have a large pulp cavity and short roots. Found in disorder such at Down's syndrome and Klienfelter's Syndrome |