Chromatin into chromosomes, the nuclear envelope break down, chromosomes attach. There are 23 pairs of chromosomes in a diploid human body cell. There are four stages of mitosis: prophase, metaphase, anaphase and telophase. Only two pairs of chromosomes are shown in the diagrams below. maternal and paternal chromosome pairs) come together forming a tetrad, in which the four. The stages of mitosis are: prophase, metaphase, anaphase and telophase. Unlike prophase of mitosis, homologous chromosome pairs (i.e. The cell membrane pinches in and eventually divides into two daughter cells. 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. Worksheets are explorelearning student exploration cell structure answer student right of each definition. 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. Lesson 3: Biological Evidence of Evolution. The chromosomes are bound tightly together and in perfect alignment by a. The DNA in chromosomes and their copies condenses to become more visible. Figure 2 Early in prophase I, homologous chromosomes come together to form a synapse. The DNA in chromosomes copies itself ready for mitosis. The cell spends most of its life in this phase. Every base pair of their DNA is identical. For Download latest MCQ questions with answers for Biology Cell. The daughter cells are clones of each other. The image shows a cell in interphase, prophase, metaphase, anaphase, and telophase. 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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