I have not observed such, but that does not rule out its possibility

Dear Sergey,

My only knowledge regards sex chromosomes of the true bugs (insect order Heteroptera), which show the inverted meiosis, while the autosomes have a normal course of meiotic events. In meiotic prophase I, the heteropteran sex chromosomes behave as univalents, i.e. do not pair and do not form synaptonemal complex (SC). In anaphase I, sister chromatids of the sex chromosomes segregate equationally. Then, in meiosis II , the X and Y chromosomes associate by the so-called ‘touch-and-go pairing’ and segregate reductionally at anaphase II (see Papeschi & Bressa 2006). However, the heteropteran neo-sex chromosomes originating by fusion with autosomes pair and form SC and segregate reductionally in anaphase I (see Bressa et al. 2009).

Best regards,

Frantisek

References:

Papeschi AG, Bressa MJ (2006) Evolutionary cytogenetics in Heteroptera. J Biol Res 5: 3–21.

Bressa M.J., Papeschi A.G., Vítková M., Kubíčková S., Fuková I., Pigozzi M.I., Marec F. (2009) Sex chromosome evolution in cotton stainers of the genus Dysdercus (Heteroptera: Pyrrhocoridae). Cytogenetic and Genome Research 125: 292-305.

Dear Dr. Marec

Many thanks for information about this very interesting case. I didn't  know it before.

Best regards,

Sergey