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Harlamova29_29 [7]
3 years ago
8

There are two main types of chromosomal disorders, those that take place on the 21st pair of chromosomes and those that ________

______.
Biology
1 answer:
vampirchik [111]3 years ago
7 0

Down syndrome and Alzheimer's disease.

Down syndrome is a chromosomal disorder which is caused by the presence of extra copy of chromosome  21. Therefore also called as Trisomy 21.

Alzheimer's disease is a most common form of dementia(reduction in brain functioning). It is caused by mutation in single gene APP (Amyloid Precursor Protein) present on chromosomer 21.

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