The penetration of a sperm into an unfertilized egg, which immediately reacts with raising of the fertilized membrane, is shown. Migration of both pronuclei and their fusion, and the developmental sequence from first cleavage division to morula are detailed.
International Science Film Collection, Audio Visual Services, Pennsylvania State University, 201 Carnegie Building, 1127 Fox Hill Rd., University Park, PA 16802, Toll-free: 800-826-0132, URL: http://www.psu.edu
Running time 11 minutes.
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