23. the last pair is sex chromosomes. XY for male n XX for female. one will has turner's syndrome if one of his sex chromosomes is absent. n one will has klinefelter's syndrome if he has extra chromosomes in sex chromosomes. so does down's syndrome when he has extra one chromosomes on 21th pair (i guess).
hah. acting like a brilliant kid. ;p
23 pairs chromosomes unless you own a 1959 Mercury, then the number goes up.
Some fewer than others but it doesnt stop them becoming reality tv stars.
Most have 23, but I've been told I have 69.