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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 |