Sex Chromosomes
Syndrome
Number of Barr Bodies
XX
None
1
XY
None
0
XO
Turner
0
XXY
Klinefelter
1
XXYY
Klinefelter
1
XXXY
Klinefelter
2
XXXXY
Klinefelter
3
XXX
Triplo-X
2
XXXX
Poly-X female
3
XXXXX
Poly-X female
4
Table 4.3:
Number of Barr bodies in human cells with different complements of sex chromosomes