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Revision notes on 5.1.1 Chromosome Structure for the CIE A Level Biology syllabus, written by the Biology experts at Save My Exams.
Revision notes on Mitosis for the Cambridge (CIE) IGCSE Biology syllabus, written by the Biology experts at Save My Exams.
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
During mitosis, two identical copies of the genome are packaged into chromosomes that are distributed equally between two daughter nuclei by a highly dynamic spindle structure.
The stages of cell division oversee the separation of identical genetic material into two new nuclei, followed by the division of the cytoplasm. Animal cell mitosis is divided into five stages—prophase, prometaphase, metaphase, anaphase, and telophase—visualized here by light microscopy with fluorescence.
5 lis 2023 · Mitosis is classically divided into either four or five stages: prophase, prometaphase (sometimes included in prophase), metaphase, anaphase, and telophase. Each phases features unique events concerning chromosomal alignment, spindle formation, and the division of cellular contents.
All chromosomes adopt a highly condensed conformation during mitosis. When they are specially stained, these mitotic chromosomes have a banding structure that allows each individual chromosome to be recognized unambiguously.
