1
Q
List symptoms and characteristics
A
Low muscle tone (babies appear "floppy) Flat facial features Hyper flexibility Enlarged tongue Upward slant to the eyes
2
Q
Inheritance
A
Most cases are not inherited. Condition is caused by trisomy 21, the chromosomes abnormality occurs as a random event during the formation of a reproductive cell in a parent. Usually occurs in the sperm cell. An error in cell division called nondisjunction results in a reproductive cell with 47 chromosomes in total
3
Q
Risk factors
A
Maternal age. 25 Year old - 1 in 2,500 chance 35 year old - 1 in 350 chance 40 year old - 1 in 100 chance 49 year old - 1 in 10 chance
Human Bio
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