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Lesson Three

Lesson Three. Cellular Reproduction: Mitosis and Meiosis. Anaphase [ 5AnE7feiz ] 分裂后期. Pole n. 棒 , 柱 , 杆 , 竿 , 极 , 磁极 , 电极 ;vt. 用竿支撑 , 用棒推 ;vi. 撑篙. Cell plate 细胞板. Centromere 着丝粒. Chromatid 染色单体. Chalone : 抑素. Mammalian [ mA5meiljEn ] : n. 哺乳动物 adj. 哺乳动物的

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Lesson Three

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  1. Lesson Three Cellular Reproduction: Mitosis and Meiosis

  2. Anaphase[5AnE7feiz]分裂后期 • Polen.棒, 柱, 杆, 竿, 极, 磁极, 电极;vt.用竿支撑, 用棒推;vi.撑篙

  3. Cell plate细胞板

  4. Centromere着丝粒 Chromatid染色单体

  5. Chalone :抑素 • Mammalian[mA5meiljEn]: n.哺乳动物 adj.哺乳动物的 • Homogenate[hE5mCdVineit]: n.均匀混合物,[生](组织)匀浆 • Adrenaline[E5drenElin]: n. [生化]肾上腺素 • Corticosteroid[7kCtikEu5stiErCid]: n.& adj.[生化]皮质甾类(的),皮质类固醇(的)

  6. Chromatin 染色质

  7. Cytokinesis胞质分裂

  8. Diploid 二倍体 • Bi, di, dipl, twi, du,二，双，两，偶 • Bicolor dichromatic twin dual • Haploid单倍体 • Hapl(o)-, mono-, uni-, 单，一，独 • Monoxide monoatomic unicellular

  9. Histone 组蛋白

  10. Homologous pair同源染色体对

  11. Interphase 分裂间期

  12. Karyotype核型，染色体组型

  13. Meiosis 减数分裂

  14. Metaphase 分裂中期

  15. Metaphase plate赤道板，中期板

  16. Mitosis 有丝分裂

  17. Nucleosome 核小体

  18. Prophase 分裂前期 Spindle 纺锤体

  19. Telophase 分裂末期

  20. Autosome[5C:tEsEum] n.正染色体, 常染色体 • Kinetochore[ki5ni:tEkC:] n.[生]动粒, 着丝粒, 着丝点 • Either of two submicroscopic attachment points for chromosomal microtubules, present on each centromere during the process of cell division. • Partition [pB:5tiFEn] n.分割, 划分, 瓜分, 分开, 隔离物;vt.区分, 隔开, 分割

  21. Pinch [pintF] n.捏,撮,收缩,紧急关头,匮乏, 压力 • vt. 掐,夹痛, 修剪, 勒索, 使感缺乏, 使萎缩, 偷 • vi.收缩, 节省 • Progeny[5prCdVini] n.后裔,后代 • Affix a-,an- (元音前用)无，非 • 无 asexual;abacterial; amoral • 否定 asymmetric;

  22. Text: 1 The nucleus and chromosome

  23. The cycle is divided into distinct phases: G1 (gap 1) S (synthesis), G2 (gap 2), and M (mitosis). As you can see, mitosis only occupies a fraction of the cycle. The rest of the time-phases G1 through G2—is known as interphase. 2 The cell cycle

  24. 2 The cell cycle

  25. 3 Mitosis:partitioning the hereditary material

  26. Kinetochore[ki5ni:tEkC:]n.[生]动粒, 着丝粒, 着丝点Either of two submicroscopic attachment points for chromosomal microtubules, present on each centromere during the process of cell division.

  27. mitosis Fig. The stages of mitosis in an onion root tip cell.

  28. 4 Cytokinesis:partitioning the cytoplasm

  29. 5 Meiosis:the basis of sexual reproduction synapsis [si5nApsis][生]染色体结合; 联会

  30. Fig. meiosis in a plant pollen grain. meiosis

  31. 6 Asexual versus sexual reproduction • Asexual • No exchange of genetic material • Mitosis • Sexual • Exchange of genetic material • Gametes • Meiosis

  32. 6 Asexual versus sexual reproduction 细菌细胞分裂

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