Cell Cycle and Cell Division
Every cell in your body came from another cell that divided. A cut on the skin heals, and a seed grows into a tree, for the same reason. Here you follow one cell through its cycle and watch mitosis make two identical cells. Then you see how meiosis makes the four different cells that become gametes. You meet the checkpoints that guard the cycle and find out what goes wrong in cancer. You also learn to count chromosomes and DNA at every stage. It serves the Indian syllabus (NCERT, NEET) and the matching topic of A-Level, IB and AP. Python counts chromosomes and times the phases.
Part of Biology · High School (11–12) (chapter 9)
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The Cell Cycle and Mitosis
How does one cell become two? A cell grows, copies its DNA and then divides. You meet the phases of the cell cycle and count the DNA and the chromosomes at each stage. Then you follow mitosis and cytokinesis in animal and plant cells and see what mitosis does for a body. It serves the Indian syllabus (NCERT, NEET) and the matching topic of A-Level, IB and AP.
Meiosis and Its Significance
How does a cell halve its chromosome number and make four different cells? You meet the five stages of prophase I, synapsis and crossing over, and the two divisions of meiosis. Then you compare meiosis with mitosis and see why it keeps the chromosome number steady and makes variation. It serves the Indian syllabus (NCERT, NEET) and the matching topic of A-Level, IB and AP.