Preferential Y-Y pairing and synapsis and abnormal meiotic recombination in a 47,XYY man with non obstructive azoospermia

Table 1 Sex chromosome pairing in pachytene spermatocytes in the 47, XYY patient

Cell type	No. of cells analyzed	No. (%^a) of cells showing Y associated with X	No. (%^a) of cells not showing Y associated with X
YY partially paired	42	27(64.3 %)^a	15(35.7 %)^a
YY completely paired	29	18(62.1 %)^a	11(37.9 %)^a
XY + Y	0	0	0
Total (%)	71	45(63.4 %)^a	26(36.6 %)^a

Sex chromosomes pairing was determined by over lapping SYCP3 signals
^aThe percentages were calculated by dividing the number of cells showing Y associated or not associated with X (respectively) with the corresponding number of cells analyzed

ISSN: 1755-8166