Robertsonian chromosomes and the nuclear architecture of mouse meiotic prophase spermatocytes

Biological Research

Table 3 Number of partially asynapsed trivalents and the type of ectopic asociations in 2n = 32 heterocygote spermatocytes

	Asynapsed trivalents	0	1	2	3	4	5	6	7	8	Total	%
Ectopic associations	none	35	1	3	4	3	2	0	0	0	47	33,6
	XY/triv	2	13	8	6	8	3	0	0	0	38	27,1
	triv/triv	0	0	5	7	4	4	0	0	0	22	15,7
	both	0	0	0	3	9	12	3	2	3	33	23,6
	Total nuclei	37	14	16	20	24	21	3	2	3	140	100

140 nuclear microspreadings from 2n = 32 pachytene spermatocytes were examined.The single axes and central element of the SC were identified by immunochemistry, using, respectively, anti-SYCP3 and anti-SYCP1 antibodies (as in Figure 5c & d).

ISSN: 0717-6287