7.344 The Fountain of Life: From Dolly to Customized Embryonic Stem Cells, Fall 2007 by Meissner, Alexander

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7.345 The Science of Sperm, Fall 2014 by Lesch, Bluma (Bibi), George, Renee

“…Sperm are tiny, haploid cells with a supremely important job: They deliver the paternal genome to the egg, helping create a zygote that develops into a new individual. For a human male, however, only a small fraction of the sperm produced will ever fertilize an egg. …”
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