In particular, it explains that humans have one fewer chromosome pair in their cells than apes, due to a mutation found in chromosome number 2 that caused two chromosomes to fuse into one.

Humans inherit one set of chromosomes from their mother and a second set from their father. In total, most human cells contain 46 chromosomes with 22 pairs of autosomes, or non-sex chromosomes ...

According to international conventions, human autosomes ... Submetacentric chromosomes, such as chromosomes 2, 6, and 10, have centromeres slightly displaced from the center.