Metaphase I preparations: DNA configurations.

1Chromosomes are symmetrically arranged on the meiotic spindle, see Figure 1A.2Chromosomes have all congressed back to the metaphase plate to form a lemon-shaped configuration, see Figure 5A.3Chiasmate chromosomes are randomly arranged on the spindle, see Figure 1B.4All the chromosomes are associated but the chromosomal mass is abnormal in structure, see Figure 1E.5Chromosomes are not present on the same spindle-like structure, see Figure 5C.6Threads staining with DAPI and an antibody to histone H3 phosphorylated at serine 10 are present that do not connect chromosomes.