How many chromosomes does a normal person have and how many downs?

Chromosomes are structures that are located in the cell nucleus and are nucleoproteins, in other words, a complex of nucleic acids with proteins.
A normal person has 23 pairs or 46 chromosomes.
People with a congenital disease (Down’s syndrome) have chromosome 21 (Normally, these chromosomes should have two, and with this deviation, there are three of them)



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