Per1 Meiosis Claymation
Elementary / Fine Arts
By Mike, Brandon, Chris, and Erin
Brief discussion: meiosis takes place in the reproductive cells of the body and it is divided into meiosis I and II. The stages are explained below in detail.
Meiosis steps
Meiosis I: Interphase, Prophase I, Metaphase I, Anaphase I, Telophase I & Cytokinesis
Meiosis II: Prophase II, Metaphase II, Anaphase II, Telophase II & Cytokinesis
Detailed explanation: Meiosis is the process of nuclear divisionwhich occurs during the final stage of gamete formation.
Meiosis is comprised of two cell divisions: a. Meiosis I (reduction phase), b. Meiosis II. By the end of Meiosis II, the 1 diploid cell that entered meiosis has become 4 haploid cells.
Meiosis I: This is sometimes referred to as the reduction division because it is during the first meiotic division that the chromosome number is reduced from 46 to 23. Meiosis I consist of four stages: prophase I, metaphase I, anaphase I, and telophase I.
Prophase I: The chromosomes become visible as they start to condense. Homologous chromosomes align directly opposite each other and are held together at several points along their length. Each pair of homologous chromosomes becomes tightly coiled. The homologous recombinant chromosomes now begin to separate but remain attached at the points where crossing over has occurred. Separation of the homologous chromosome pairs proceeds as the chromosomes become maximally condensed.
Metaphase I: The nuclear membrane disappears and the chromosomes become aligned on the equatorial plane of the cell, where they have become attached to the spindle as in metaphase of mitosis.
Anaphase I: The chromosomes now separate to opposite poles of the cell as the spindle contracts.
Telophase I: Each set of haploid chromosomes has now separated completely to opposite ends of the cell which cleaves into two new daughter gametes, so-called oocytes.
Meiosis II: This is essentially similar to an ordinary mitotic division. Each chromosome, which exists as a pair of chromatids, becomes aligned along the center of the cell and then splits leading to the formation of two new daughter gametes, known as spermatids or ova.
Mitosis vs. Meiosis: Meiosis differs from mitosis in three fundamental ways: Mitosis results in each daughter cell having adiploid chromosome complement (46). Whereas in meiosis the mature gamete has ahaploid complement of 23 chromosomes. Mitosis takes place in somatic cells and during the early cell divisions in gamete formation. Meiosis occurs only at the final division of gamete maturation. Mitosis occurs as a single one-step process. Meiosis can be considered as two cell divisions known as meiosis I and meiosis II, each of which can be considered as having prophase, metaphase, anaphase and telophase stages as in mitosis.
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Meiosis steps
Meiosis I: Interphase, Prophase I, Metaphase I, Anaphase I, Telophase I & Cytokinesis
Meiosis II: Prophase II, Metaphase II, Anaphase II, Telophase II & Cytokinesis
Detailed explanation: Meiosis is the process of nuclear divisionwhich occurs during the final stage of gamete formation.
Meiosis is comprised of two cell divisions: a. Meiosis I (reduction phase), b. Meiosis II. By the end of Meiosis II, the 1 diploid cell that entered meiosis has become 4 haploid cells.
Meiosis I: This is sometimes referred to as the reduction division because it is during the first meiotic division that the chromosome number is reduced from 46 to 23. Meiosis I consist of four stages: prophase I, metaphase I, anaphase I, and telophase I.
Prophase I: The chromosomes become visible as they start to condense. Homologous chromosomes align directly opposite each other and are held together at several points along their length. Each pair of homologous chromosomes becomes tightly coiled. The homologous recombinant chromosomes now begin to separate but remain attached at the points where crossing over has occurred. Separation of the homologous chromosome pairs proceeds as the chromosomes become maximally condensed.
Metaphase I: The nuclear membrane disappears and the chromosomes become aligned on the equatorial plane of the cell, where they have become attached to the spindle as in metaphase of mitosis.
Anaphase I: The chromosomes now separate to opposite poles of the cell as the spindle contracts.
Telophase I: Each set of haploid chromosomes has now separated completely to opposite ends of the cell which cleaves into two new daughter gametes, so-called oocytes.
Meiosis II: This is essentially similar to an ordinary mitotic division. Each chromosome, which exists as a pair of chromatids, becomes aligned along the center of the cell and then splits leading to the formation of two new daughter gametes, known as spermatids or ova.
Mitosis vs. Meiosis: Meiosis differs from mitosis in three fundamental ways: Mitosis results in each daughter cell having adiploid chromosome complement (46). Whereas in meiosis the mature gamete has ahaploid complement of 23 chromosomes. Mitosis takes place in somatic cells and during the early cell divisions in gamete formation. Meiosis occurs only at the final division of gamete maturation. Mitosis occurs as a single one-step process. Meiosis can be considered as two cell divisions known as meiosis I and meiosis II, each of which can be considered as having prophase, metaphase, anaphase and telophase stages as in mitosis.
Thanks for watching!
