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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 prophase of mitosis, chromosomes undergo maximum compaction into heterochromatin, becoming distinctly visible under a microscope. This compaction is crucial for the efficient segregation of chromosomes during cell division, ensuring genetic stability and consistency in daughter cells.
Drawing the progression of chromosome behaviour will help you remember the stages and their particularities. Everything you need to know about Chromosome behaviour in mitosis for the A Level Biology CAIE exam, totally free, with assessment questions, text & videos.
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.
7 kwi 2024 · In the broader context of cell biology, mitosis is a segment of the cell cycle where replicated chromosomes segregate into fresh nuclei. This division yields genetically identical cells, preserving the total chromosomal count, hence its designation as an equational division.
