Cell division
11 videos
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AP Biology - Cell Division: Why Your Body Needs It
Learn the difference between mitosis and meiosis: how mitosis creates identical cells for growth and repair, while meiosis produces unique sex cells for reproduction.
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AP Biology - Haploid, Diploid, Gametes & Zygotes
Learn how haploid gametes (23 chromosomes) fuse during fertilization to create a diploid zygote (46 chromosomes) and understand homologous chromosome pairs.
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AP Biology - Chromosomes, Chromatids & Chromatin
This video explains the differences between chromatin, chromosomes, and chromatids, clarifying how DNA packaging changes during cell division and replication.
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AP Biology - The Cell Cycle & Interphase
This video explains interphase, the longest part of the cell cycle where cells grow, copy DNA, and prepare for division through G1, S, and G2 phases.
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AP Biology - Mitosis: The Four Phases
Learn the four phases of mitosis (PMAT) and how one cell divides into two identical daughter cells. Includes prophase, metaphase, anaphase, telophase, and cytokinesis.
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AP Biology - Meiosis I: Reducing the Chromosome Number
This video explains meiosis I, the reduction division that separates homologous chromosomes, creating genetic diversity through crossing over and independent assortment.
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AP Biology - Meiosis II: Finishing the Job
This video explains meiosis II, where sister chromatids separate to produce four genetically unique haploid gametes from one diploid cell.
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AP Biology - Mitosis vs Meiosis: Side-by-Side Comparison
This video compares mitosis and meiosis, explaining their purposes, locations, division rounds, and outcomes. It highlights key differences in chromosome numbers and genetic variation.
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AP Biology - Cancer and Cell Cycle Regulation
This video explains how cell cycle checkpoints, cyclins, CDKs, and tumor suppressors regulate cell division, and how mutations lead to uncontrolled growth and cancer.
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AP Biology - Apoptosis: Programmed Cell Death
Learn about apoptosis, the controlled cell death process that shapes your body, maintains cell balance, and prevents cancer by allowing cells to self-destruct safely.
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AP Biology - Cell Division Problem: Identifying Stages and Chromosome Counts
Learn to count chromosomes and distinguish mitosis from meiosis. Covers chromosome stages, sister chromatids vs homologous pairs, and common exam mistakes.