There is a specific way to label a karyotype. A human has 23 sets of chromosomes, and thus, a total of 46 chromosomes. Twenty-two of these pairs are autosomal chromosomes, and the last pair is comprised of the sex chromosomes, which don’t have to be identical. A karyotype is labeled in the following fashion: number of chromosomes, sex chromosomes (by listing XX for female, or XY for male), any genetic malfunctions. For example, a normal male would be 46, XY, and a normal female would be 46, XX.
Labelling the chromosome using international cytogenetic nomenclature
inversion and transloation examples shown below by arrows