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

Table 2 Sex chromosome synapsis 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 synapsed	52	35(67.3 %)^a	17(32.7 %)^a
YY completely synapsed	19	10(52.6 %)^a	9(47.4 %)^a
XY + Y	0	0	0
Total (%)	71	45(63.4 %)^a	26(36.6 %)^a

Sex chromosomes synapsis was determined by over lapping SYCP1 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