Mitosis includes four phases, prophase, metaphase, anaphase, and telophase. Like mitosis, meiosis also has distinct stages called prophase, metaphase, anaphase, and telophase. These stages are prophase, prometaphase, metaphase, anaphase, and telophase. Mitosis is composed of many stages which include, prophase, metaphase, anaphase, telophase, and cytokinesis, respectively. Then, an interphase or metaphase chromosome preparation is produced. Micronuclei are structures formed by mitotic errors in the transition from metaphase to anaphase. Ovulated eggs become arrested in metaphase II until fertilization triggers the second meiotic division. At prophase and metaphase, survivin is mainly nuclear in location. The oocyte is technically still a secondary oocyte, suspended in the metaphase II of meiosis. If the cell successfully passes through the metaphase checkpoint, it proceeds to anaphase. Chromosomes are thus unable to achieve a metaphase spindle configuration. Meiosis then proceeds to second metaphase, where it pauses again until fertilization. Three main checkpoints exist&colon; the G/S checkpoint, the G/M checkpoint and the metaphase (mitotic) checkpoint. The hardest part of SCNT is removing maternal DNA from an oocyte at metaphase II. In metaphase, they are called chromatids.