Normal male karyotype
46,XY
Also known as: 46 XY
46,XY is the standard male karyotype: 46 chromosomes made up of 22 pairs of autosomes, one X, and one Y. It is the baseline that every abnormal karyotype is read against.
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What the notation means
46- total chromosome count (the normal human number)
XY- sex chromosomes: one X, one Y (usual male karyotype)