Fertilization
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Diagrams the phases of fertilization as: release of the sperm, approach, penetration, fusion, and activation, and examines the "how" of these phases. Shows Rothchild's diagrams of sperm actions explaining chemotaxis. Shows the process of fertilization using sea urchin eggs. Pictures through microcinematography a sperm penetrating an egg, the enlargement of the sperm head, the production of the asters from the middle piece, and formation of the new cell spindles. Mentions the work of Pincus and others in the study of parthenogenesis and points out some methods of artificially inducing fatherless reproduction. Concludes that since several of these operations cause parthenogenesis, the precise method of activation is still unknown.
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Source: Educational Film Guide 1946 · Original permalink · Record added 2024-04-22 21:30:43