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Out of the 23 pairs of human chromosomes, how many pairs are described in the chapter as always being a 'perfect' matching pair (autosomes)?

Question
Out of the 23 pairs of human chromosomes, how many pairs are described in the chapter as always being a 'perfect' matching pair (autosomes)?
22 pairs
23 pairs
21 pairs
20 pairs
Answer
22 pairs
Detailed Explanation
The chapter states humans have 22 pairs of chromosomes that are always properly matched, plus one pair of sex chromosomes that may not match.
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