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Although mitosis is, in reality, one continuous process, it can be divided into four main stages; These stages are: Prophase; Metaphase; Anaphase; Telophase; Most organisms contain many chromosomes in the nuclei of their cells (eg. humans have 46) but the diagrams below show mitosis of an animal cell with only four chromosomes, for simplicity
Revision notes on 5.1.1 Chromosome Structure for the CIE A Level Biology syllabus, written by the Biology experts at Save My Exams.
During metaphase, the chromosomes have moved to the center of the cell (diagram below, photograph above). This line of chromosomes is referred to as the metaphase plate.
In biology, Mitosis is the process of chromosome segregation and nuclear division that follows replication of the genetic material in eukaryotic cells. This process assures that each daughter nucleus receives a complete copy of the organism's genetic material.
15 gru 2022 · The importance of mitosis and meiosis to an organism is obvious when we consider that genes are a part of the chromosome and the genes must be copied and distributed properly to produce viable daughter cells. The mechanisms of these events are far from being completely understood.
The major work of packing the DNA up into the tight column that forms the mitotic chromosomes falls to two proteins that are part of the condensin family. Condensin I and II each have their own role to play in the process (Figure 08-11 and Video 08-03).
Topic 1.6: STAGES of miTosis Stage Diagram Key Events Interphase (2n) • DNA is uncondensed (chromatin) • DNA is replicated (S phase) to form genetically identical sister chromatids • Cell grows in size and organelles are duplicated (G 1 and G 2) Prophase (2n) • DNA supercoils and condenses (forms visible chromosomes)
