What does it mean to have an Extra Chromosome?

What does it mean to have an Extra Chromosome?

“An extra chromosome in our genome means a person or fetus has one additional chromosome with a pair besides 23 pairs and causes serious health issues.”  ‘Chromosome’ is a common term in recent times, we know, it is the unit of inheritance or a place where the DNA is located. Scientifically, a network of histone …

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