Chapter 10: Cell Cycle and Cell Division | Class 11 Biology | Complete Chapter for NEET | Iyal.App

Описание: 🔬 Cell Cycle Fundamentals: Every organism starts as a single cell. Through the cell cycle—a sequence of growth, DNA replication, and division—one cell becomes millions. Learn how cells reproduce and maintain genetic integrity through perfectly coordinated processes.
⏱️ Timing & Structure: A typical human cell completes its cycle in about 24 hours, but actual division takes only ~1 hour. Discover why 95% of the cell cycle is preparation. Divided into two main phases: Interphase and M Phase.
📊 Interphase Deep Dive: The three preparation phases—G1 Phase (growth & organelle duplication), S Phase (DNA replication from 2-C to 4-C), and G2 Phase (protein synthesis for mitosis). Understand how cells prepare without rushing division.
🧬 Mitosis Explained: From Prophase through Telophase, watch chromosomes align, separate, and move to opposite poles. Mitosis produces two identical daughter cells with identical chromosomes—essential for growth and tissue repair.
🔄 Cytokinesis Process: The physical division of cytoplasm that completes cell division. In animal cells, the cleavage furrow pinches the cell. In plant cells, a new cell wall forms. Both ensure equal distribution of organelles.
⚖️ Meiosis vs Mitosis: Meiosis is a reduction division creating genetic diversity. Two divisions produce four haploid gametes (sperm, eggs, pollen) with half the chromosomes—perfect for sexual reproduction.
🧬 Genetic Diversity & Evolution: Meiosis creates variation through crossing over and independent assortment. This genetic diversity is essential for evolution, population resilience, and species adaptation across generations.
📚 Why It Matters: Cell division isn't just about growth—it's about life itself. From your development in the womb to maintaining your body today, mitosis and meiosis are the processes that make life possible.

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