Table 1.

Frequency of 2n = 40 spermatocyte bearers with two given distinguished bivalents associated between them

Pair of distinguishable bivalents	Spermatocyte percentage with those bivalents associated between them
16 and 17	8
9 and 14	10
14 and 16	11
9 and 17	10

One hundred spermatocyte nuclei for each pair of bivalents were scored.

The nuclei were stained with DAPI, and the specific bivalents were identified by FISH and specific DNA probes.