meiosis造句
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.
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.
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