MALE CARYOTYPE. MALE CARYOTYPE Normal karyotype (46,XY - male). Human chromosomes are classified by groups according to the Denver classification in which they are arranged by decreasing length and on the basis of their centromere position. The 22 pairs of autosomes (non-sex chromosomes) are arranged into seven groups: group A (chromosomes 1, 2 and 3), group B (chromosomes 4 and 5), group C (chromosomes 6 to 12), group D (chromosomes 13 to 15), group E (chromosomes 16 to 18), group F