Humans have basically 23 pairs of chromosomes while cats have 19 pairs of chromosomes. Humans: females= 46 X chromosome, males= 45 X chromosomes, 1 Y chromosome. Cats: Females =38 X chromosomes, m ales= 37 X chromosomes, 1 Y chromosome.
Human males and females have the same number of chromosomes - 23 pairs, for a total of 46. The difference is that males have a pairing of chromosomes that is "XY," whereas females have a pairing that is "XX" that determines gender. - Nursing Student