NOT a mutation in Down’s syndrome
Correct Answer: VNTR's
Description: (D) VNTR's# A Variable Number Tandem Repeat (or VNTR) is a location in a genome where a short nucleotide sequence is organized as a tandem repeat is associated with major psychiatric disorders.> Trisomy 21 also known by the karyotype 47, XX+21 for females and 47,XY,+21 for males.> The extra chromosome 21 material may also occur due to a Robertsonian translocation in 2-4% cases. In this situation, the long arm of chromosome 21 is attached to another chromosome, often chromosome 14.
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