Comparison Of Metaphase I And Telophase I, Anaphase
In exercise three the same procedures took place as it did in exercise one, but meiosis was being demonstrated in this exercise. Meiosis I consists of the following stages: prophase I, metaphase I, Anaphase I, and Telophase/ Cytokinesis I. In Meiosis II the following stages occur: prophase II, Metaphase II, Anaphase II, and Telophase/ Cytokinesis II. In prophase I the chromosomes begin to condense and spindles begin to form. The chromosomes then begin to pair up by size and cross exchange genetic information. During all this the centromeres begin to move and the nuclear envelope and the nucleoli disappeared (Figure 7). The homologous chromosomes then align on the “equator” in the metaphase I stage (Figure 8). In anaphase I the chromosomes
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927 Words | 4 PagesExtra autosomes and extra or missing sex chromosomes relate to errors in meiosis because they are the result of chromosomes failing to properly separate in meiosis. Deletions, duplications, inversions, and translocations relate to an error in meiosis because they are a consequence of homologous chromosomes failing to align correctly in meiosis or result from errors when crossing over occurs. 8. Could nondisjunction occur during mitosis? Compare and contrast the likely consequence of nondisjunction in mitosis vs.
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852 Words | 4 PagesIn which case, the nuclear envelope is visible again and the DNA uncoil into chromatin. No DNA replication occurs during interphase II. In prophase II, the nuclear envelope disintegrates again, and the chromosomes stay in sister chromatid form (if they unraveled into chromatin during interphase II they condense again). In metaphase II, spindle fibers from opposing poles of the cell attach to the centromeres of each sister chromatid. Sister chromatids are two identical copies/strands connected by one centromere that results from the replication of a chromosome during the S phase.
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