Which kind of disease is "Down's syndrome"?
(a) Sex-linked (b) Viral
(c) Bacterial (d) Autosomal
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Explanation:
the answer is a) sex linked
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Dear Student,
In humans, there are total 46 chromosomes. Any deviation from this results in aneuploidy.
◆ Answer -
(d) Autosomal
● Down syndrome -
- Down's syndrome is caused by non-dysjuction of chromosomes during meiosis.
- Karyotype of Downs syndrome is usually trisommy 21.
# Clinical features -
- mental retardation
- webbing of neck
- flat facies
- upward slant to eye
- congenital defects
- dwarfism
- simian course
- infertility
- abnormal ears
- Brushfield spots
# Diagnosis -
- Down's syndrome can be diagnosed prenatally by karto-typing.
Thanks dear. Hope this helps you...
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