![]() ![]() There are 23 pairs of chromosomes in a diploid human body cell. A cell entering M phase manifests a number of. It follows G2, the final phase of interphase. Only two pairs of chromosomes are shown in the diagrams below. The first phase of mitosis within M phase is called prophase. The membrane around the nucleus disappears. The stages of mitosis are: prophase, metaphase, anaphase and telophase. Prophase, The DNA in chromosomes and their copies condenses to become more visible. The cell membrane pinches in and eventually divides into two daughter cells. Cell Division and Cycle Prophase - During this phase the chromatin condenses into chromosomes and the nuclear membrane and nucleolus break down. New membranes form around the chromosomes at each end of the cell. Telophase Two nuclei formed after nuclear envelopes reform around each group of chromosomes. ![]() Anaphase Chromatids break apart at the centromere and move to opposite poles. Metaphase Chromosomes line up in the middle of the cell. The membrane around the nucleus disappears.Ĭhromosomes and their copies line up in the middle of the cell.Ĭhromosomes and their copies are pulled to different ends of the cell. The stages of Mitosis are: Prophase The chromosomes shorten and thicken. Each phase involves characteristic steps in the process of chromosome. The DNA in chromosomes and their copies condenses to become more visible. Mitosis consists of five morphologically distinct phases: prophase, prometaphase, metaphase, anaphase, and telophase. The DNA in chromosomes copies itself ready for mitosis. The cell spends most of its life in this phase. In prophase, the chromatin has condensed. Every base pair of their DNA is identical. Notice that the chromatin is spread throughout the nucleus, and the nucleolus is visible. The daughter cells are clones of each other. Mitosis is a type of cell division in which a diploid body cell copies itself and finally divides into two identical diploid daughter cells. ![]()
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