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9.1: Tutorial: The cell division cycle

This tutorial explores the stages of the cell cycle in a single eukaryotic cell.

9.2: Tutorial: Mitosis and cell division

Cell division is the climax of the cell cycle; its two stages, mitosis and cytokinesis, are explored in this tutorial.

9.3: Tutorial: Meiosis

This tutorial reviews the process by which sperm and egg cells are formed.

9.1: Process Animation: The Cell Division Cycle

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9.2: Process Animation: Mitosis and Cell Division

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9.3: Process Animation: Meiosis

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W. W. Norton & Company has been independent since its founding in 1923, when William Warder Norton and Margaret D. Norton first published lectures delivered at the People's Institute, the adult education division of New York City's Cooper Union. The Nortons soon expanded their program beyond the Institute, publishing books by celebrated academics from America and abroad. By mid-century, the two major pillars of Norton's publishing program—trade books and college texts—were firmly established. In the 1950s, the Norton family transferred control of the company to its employees, and today—with a staff of 400 and a comparable number of trade, college, and professional titles published each year—W. W. Norton & Company stands as the largest and oldest publishing house owned wholly by its employees.