词汇 | meiosis |
释义 | meiosis noun[ U ] biology specializeduk /maɪˈəʊ.sɪs/ us /maɪˈoʊ.sɪs/ the type of cell division that happens as part of reproduction (= the process of producing young animals or plants), in which one cell divides into four gametes (= reproductive cells), each with a different mixture of chromosomes and half the number contained in the original cell减数分裂(发生在有性生殖生物中的细胞分裂过程,一个细胞分为四个配子,每个拥有不同的混合染色体,一半存于原细胞中) Compare mitosis Cells actin anaphase anti-platelet assort axoplasm histochemistry histography homologous chromosomes infiltration intercellular neoplasia nerve fibre neurofibril neurofibrillary neuroglia teratoma tetrad thrombocyte thymocyte turgor Related wordmeiotic meiosis | American Dictionarymeiosis noun[ U ] us/mɑɪˈoʊ·sɪs/ biology the type of cell division in which one cell divides into four gametes (= male or female cells that join to form an organism), each with a different mixture of chromosomes (= cell structures) and half the number as were in the original cell Examples of meiosismeiosis Meiosis in protists : recent advances and persisting problems. The rest of the mutations were clearly generated during meiosis and occurred in tetrads with any progenitor alleles. We wanted to find out whether such treatment affects the ability of the egg to complete the meiosis and to transform nuclei of spermatozoa. Immature oocytes contained intact germinal vesicles; mature oocytes resumed meiosis and had undergone germinal vesicle breakdown. We conclude that this mechanism has probably already developed by the time the germ cells have become committed to meiosis. Our results here indicate that this factor or factors may have developed by the time the germ cells have become committed to meiosis. As growth is completed, transcription becomes silent, and sufficient molecules are stored in the oocytes for meiosis and full developmental competence. Effect of prematuration, meiosis activating sterol and enriched maturation medium on the nuclear maturation and competence to development of calf oocytes. In less well-spread preparations it was apparent that the triploids failed in meiosis. This allows for comparisons to be drawn between strains that are capable or incapable of undergoing meiosis, without the confounding effects of differences in ploidy. Note that after a renaming of the constitutive elements, the inclusion of the recombination step makes the whole process a canonical example of meiosis. Function and characteristics of repetitive calcium waves associated with meiosis. Resumption of meiosis: mechanism involved in meiotic progression and its relation with developmental competence. As an oocyte grows, its diameter increases and the competence to complete meiosis also is improved. It is not understood how oocytes acquire meiotic competence during their growth phase to become competent to resume and complete meiosis. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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