Khan Academy Static

Normal human body cells have two complete sets of chromosomes, while sperm and egg cells have just one set each. How, then, does a normal body cell give rise to sperm or eggs? The answer lies in a two-step division process called meiosis. Learn more about meiosis and how it contributes to genetic variation in humans (and other sexually reproducing organisms).

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9659_Phases_of_meiosis_I.html

9658_Chromosomal_crossover_in_meiosis_I.html

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9660_Phases_of_meiosis_II.html