![What is Down’s syndrome? Down syndrome or down’s syndrome( named in UK) is a chromosomal disorder caused by the presence of all or part of an extra 21st chromosome{additional chromosome, as a result total chromosome number becomes 47(45A+XX/XY) instead of 46(44A+XX/XY)}. The average IQ of children with down’s syndrome is around 50 compared to normal children with an IQ of 100. J.L Down ,[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Downs syndrome
- 3. The disorder was identified as a chromosome 21 trisomy by Jerome Lejeune in 1959.
- 7. Small eyes.
- 10. Macroglossia(enlarged tongue near the tonsils).
- 11. Brushfield spots(white spots on Iris).
- 12. Speech, motor skills delay.
- 13. Short stature(149cm women,157cm men)
- 15. Hematological Malignancies(such as Leukemia).
- 16. Thyroid disorders(hypothyroidism due to dysfunction of thyroid gland).
- 17. Infertility.
- 18. Gastrointestinal Problems(duodenal atresia,annular pancres etc).
- 19. Opthalmology(cataracts,glaucoma,refractive errors brushfield spots).Health benefits- Down syndrome patients experiences reduced incidences of many cancers except leukemia as a direct result of Tumor-suppressor genes on chromosome 21.
- 20. Genetics Trisomy of 21st chromosome