1. After 24 h the morphology of the pachytene cells is greatly reduced.

2. Pachytene FISH results showed that most of chromosome ends possess the telomere tandem repeats, but the signals on different chromosomes were not the same in intensity.

3. Each chromosome in pachytene actually have been composed of two chromatids.

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4. The analysis results of chromomeres in pachytene indicated that chromomere contents were high in the whole chromosome group and the largest proportion was those with a relative length of 1% -3%.

5. Complete pachytene synaptonemal complexes from spermatocytes of the silkworm (Bombyx mori) are stretched out by water spreading technique.

6. The synaptonemal complexes stretch gradually from the early pachytene to late pachytene.

7. The proportion of pachytene cells in 5 fertile men was 67-78%.

8. The XY chromosome's synaptic behavior was discussed and the different development stage of SC in pachytene was described based on its sex chromosome's synaptic character.

9. Results:Among the 54 cases there were 45 cases with meiotic arrest in pachytene stage, 6 univalent cases, 2 multi valent cases and 1 case with normal meiosis.

10. The density of ribosome and the number of organelles decreased significantly at pachytene stage.

11. Prophase may be divided into successive stages termed leptotene, zygotene, pachytene, diplotene, and diakinesis .

12. The CPD bands exhibited on mitotic metaphase chromosomes corresponded to the prominent bands exhibited on the pachytene chromosomes.

13. Transpositional points between chromosome 6 and 12 were anchored in 1 and 3 BAC clone's pool respectively by fluorescence in situ hybridization technology of pachytene chromosomes.

14. The EB ( Essential Balm ) method was adopted to study, the G - bands and macrocoilson the maize pachytene chromosome.

15. Second, it is successful to try applying the dripping method of suspended cells obtained by enzyme treatment instead of traditional method for pachytene chromosomes preparation.

16. Chromomeres in varying degrees of clearness were observed on early, middle and late pachytene bivalents in red crucian carp, Carassius auratus.

17. Baimiao use practices drawn King, requested by the author Mr T for pachytene sketches, composed of vivid images.

18. Pairing of homologous chromosomes (synapsis) commences at one or several points on the chromosome and is clearly seen during PACHYTENE of meiosis I.

19. Cable speeds paragraph 99, sub-paragraph 10 of peeling speed settings, or thread can make pachytene stable production.