1. Later, however, these germ cells undergo meiosis, to produce gametes.

2. Telophase then brings meiosis I to a close: the nuclear envelope starts to form again.

3. Each of the two divisions of meiosis produces two daughter cells, each of which contains the same amount of nuclear material.

4. But meiosis in eggs may take half a century to run its course.

5. Just add calcium to the oocyte and meiosis will run to completion.

6. The first meiosis has produced a polar body, and this lies trapped beneath the zona pellucida.

7. Required for normal segregation in mitosis and meiosis.

8. Meiosis of microspore mother cells is synchronous or unsynchronous.

9. The separation of homologous chromosomes during meiosis.

10. Abnormal meiosis also was observed.

11. Chromosomes are distributed by spindles in mitosis and meiosis.

12. Synapsis before meiosis is restricted by PH genes.

13. The failure of any process in meiosis can result in chromosome mal - disjunction.

14. Zygote meiosis can be observed with fresh-water algae Chlamydomonas, Spirogyra , Chara for assistant materials.

15. Cytokinesis of microspore mother cells during meiosis was simultaneous type, and pollen grains were 2-cell, it suggested that the Dioscoreaceae was rather primitive in Angiosperm.

16. Conclusion Testosterone propionate plays a positive role in meiosis and maturation of spermatocyte in mice.

17. On germination, the zygospore undergoes meiosis to produce haploid cells that give rise to a new thallus.

18. Subsequently, after meiosis, the callose decayed centripetally and released four immature microspores and this phenomena suggested the types of cytokinesis the mixture of simultaneous and successes.

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19. Since they are pure-bred cells, they are perfectly capable of meiosis.

20. The touch of the sperm on the oocyte's outer membrane stimulates the second meiosis to move to completion.

21. Staining with the improved carbolfuchsin- aniline blue fluorescence method is a convenient and efficient way to observe the behavior of the callose wall of microspore mother cells during meiosis.

22. Bivalent Describing any pair of homologous chromosomes when they pair up during MEIOSIS.

23. These are the haploid sexual spores that were produced following meiosis inside the basidium .

24. 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.

25. Autopolyploids may arise from the fusion of diploid gametes that have resulted from the NONDISJUNCTION of chromosomes at meiosis.

26. The variations of CKC may be the main reason for the chromosomal nondisjunction during meiosis that is attributed to the adverse pregnancy.

27. Terminalization The movement of chiasmata to the end of the bivalent arms, a process that may occur during late prophase I of meiosis.

28. Aneuspory The production of an unusual number of spores during meiosis of a spore mother cell.

29. After an analysis of the published papers and our elementary study, we draw the conclusion that meiosis in Porphyra has not been solved satisfactorily and further research is needed.

30. The expression change of BOULE gene or the absence of BOULE protein brings on meiosis arrest and spermatogenic failure, which can lead to azoospermia and male infertility.

31. During the meiosis of microspore mother cells, the amount of starches apparently increased in parenchyma around vascular bundle but there were no starches in tapetal and middle layer cells.

32. BOULE protein, a new member of DAZ family, is found in 2001, and is the key regulation factor in meiosis of human spermatogenesis.

33. Doubling of chromosomes improved the meiosis obviously, but tetraploid hybrid was still acarpous which may be related to the nucleo-cytoplasmic incompatibility.

34. The male pronucleus forms when the second meiosis is completed.

35. Cytokinesis The division of the cytoplasm after nuclear division ( mitosis or meiosis ).

36. C412S in normal PMC meiosis, however, showed a peak pollen abortion at later mononucleate stage of microsporogenesis , which mostly belonged to spherical abortion type.

37. Mammalian Spermatogenesis is a unique cell differentiation process and can be divided into three stages: mitosis, meiosis, and spermiogenesis .

38. At the stage of meiosis prophase, microspore mother cell begin to accumulate callose wall.

39. The idiogram of SC karyotyping of Eri Silkworm by 9 nuclei is made and the meiosis stage of Eri silkworm is discussed in the present paper.

40. The karyotype of Nelumbo nucifera during meiosis zygotene was established in this study, which would help the studies of meiosis and molecular cytogenetics in lotus.

41. Meiosis, which occurs only in the formation of gametes, is a specialized form of cell division.

42. Spindle The spindle-shaped structure formed in the cytoplasm during MITOSIS and MEIOSIS that is responsible for moving the chromatids and chromosomes to opposite poles of the cell.

43. Furthermore, the other features of Horner's syndrome ( meiosis and anhidrosis ) are not described.

44. Ubisch bodies and lipid bodies are found in the glandular tapetums. In meiosis of microsporocyte, cytokinesis is is a simultaneous type, which produces an isobilateral tetrad.

45. Chiasma (pl. chiasmata) A connection between homologous chromosomes seen during the prophase stage of meiosis.

46. The heterozygote genotypes in F2 population in this type of species are different from those in general species in which the genetic recombination occurs in meiosis of both male and female.

47. When the tapetum disintegrates gradually later, microspore mother cell has still not entered meiosis, finally disintegrated.

48. The stage of mitosis and meiosis in which the chromosomes nuclear spindle.

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49. The meiosis abnormalities phenomenon in Dendranthema and some of their hybrids were observed, and the formation mechanism also the role which played in the process of phylogenesis were analyzed.

50. Cycling meiosis and fertilization events produces a series of transitions between alternating haploid and diploid states.

51. Apospory, aposporous The development of a gametophyte directly from a sporophyte without the occurrence of meiosis or spore formation.

52. It was concluded that meiosis did not happen during the most process of gametogenesis in gynogenetic silver crucian carp eggs, even when they were stimulated by homologous sperms.

53. In addition, correlations between the meiosis and callose deposition in the wall of megasporocyte have been discussed.

54. The archesporial cells differentiated from single archesporium , the meiosis of microspore mother cells were continuous type and tetrads were tetrahedral.

55. Meiosis comprises a pair of specialized nuclear divisions that produce haploid germ cells.

56. Centromere The region of the chromosome that contains the kinetochore, the structure that becomes attached to the nuclear spindle during mitosis and meiosis.

57. Spore mother cell A cell that gives rise to four haploid spores by meiosis.

58. The stability of meiosis seed-set rate and plumpness of kernels might be changed when the cytoplasm of a triticale was changed.

59. The microspore mother cells give rise to isobilateral tetrads by meiosis. Cytokinesis is successive. The mature pollen grains are 2-celled and are shed singly.

60. The results were as follows:the meiosis in pollen mother cells of radish simultaneous cytokinesis and chromosomes could be identified as rod or ring bivalents in diakinesis except for 3% abnormal.

61. Potassium antimonate was used to locate calcium in the fertile and sterile anther of a thermo-sensitive genie male-sterile rice at microspore mother cell meiosis stage and at early microspore stage.

62. During this stage in mitosis and the second division of meiosis the chromosomes uncoil and disperse, the nuclear spindle degenerates, nucleoli reappear, and a new nuclear membrane forms.

63. These functions include protecting the chromosome ends, initiating the homologue alignment in meiosis, and participating the mechanism of DNA repairing, etc.

64. These findings provide insights into the evolution of meiosis and kinetochore regulation during mitosis and meiosis.

65. The position of the centromere and the behavior of chromosomes during meiosis also important.

66. Aneuploidy The condition, resulting from nondisjunction of homologous chromosomes at meiosis, in which one or more chromosomes are missing from or added to the normal somatic chromosome number.

67. A pair of homologous, synapsed chromosomes associated together during meiosis.

68. Chromomere A small beadlike deeply staining structure seen in chromosomes during prophase of mitosis and meiosis.

69. During meiosis, callose deposit on the micropylar end wall of the megasporocyte, but the cell was not enclosed by callose.

70. Diakinesis The last stage of the PROPHASE in the first division of MEIOSIS.

71. Effects of pollen mother cells and meiosis of microspores in Impations balsamina were investigated.

72. When microspore mother cell preparing meiosis, abundant calcium precipitates appeared in cytoplasm of tapetal cells and microspore mother cells, and in callus wall surrounding the cells.

73. Some abnormal division had been observed at microspore mother cell meiosis stage, e. g. chromosome pairing abnormally, aberrant dyad formation and asynchronous dyad division.

74. Objective: To determine the effect of methylbenzene on meiosis of spermatocyte from mouse testis.

75. Objective:To estimate the number of spermatids generated by one primary spermatocyte and thus evaluate the efficiency of meiosis during spermatogenesis in normal adult men.

76. Synapsis (pairing) The association of homologous chromosomes during the prophase stage of meiosis that leads to the production of a haploid number of bivalents.

77. Gametes may develop without fertilization, or meiosis may substantially precede gamete formation.

78. Secondary oocyte immediately into the 2 nd meiosis, and stop at the metaphase.

79. The meiosis in Porphyra is an important theoretical basis for breeding and genetic studies.

80. In order to study the general law on meiosis of Periplaneta Brunnea. Air-dried method was used to observe the chromosome of spermatogonium in different stages.

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

82. Moreover, the correlation of PMC meiosis(), phylliform index and RAPD marker was discussed.

83. After meiosis, abundant small starches appeared in parenchyma around vascular bundle, and the size of tapetal cells increased and became high vacuolation but there were no starches in the cells.

84. Genetics: a characteristic resulting from the exchange of genetic material between homologous chromosomes during meiosis.

85. Mitosis and meiosis divisionsexual reproduction possible . Each means of passing on hereditary information has advantages.

86. The main reason of sterile under the self-pollination is the abnormality of the meiosis of pollen mother cells in tetraploid and the abortion of all pollens.

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87. Haploid - Having only one set of chromosomes, usually by meiosis, or resulting from an unfertilized eggs.

88. The normal expression of proto-oncogenes plays an important role in the regulation of spermatogonial mitosis , spermatocyte meiosis as well as spermiogenesis and sperm maturation.

89. In meiosis, the pollen mother cells that abnormally acted made up about 10.28% and the male gametophytes abnormally acted at a frequency of 3.2% and mainly aborted at uninucleate stage.