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17.1: Tutorial: Gene flow

This tutorial explores how new alleles can be introduced into populations as individuals move from one population to another.

17.2: Activity: The Hardy-Weinberg equation and the Punnett Square

Apply the Hardy-Weinberg equation to a population in equilibrium.

17.4: Tutorial: The crisis in antibiotic resistance

This tutorial explores the reasons why bacteria are becoming resistant to many of the antibiotics in our medical arsenal.

17.1: Process Animation: The Hardy-Weinberg Equation

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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.