. The physical basis of heredity . Heredity. / PxQ. 81.—First spermatocyte division a-c, and the second spermatocyte division d-f in the hornet. (After Mevea.) in that the second division produces two functional sperms, both female producing. Since the male comes from an unfertilized egg, the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Morgan, Thomas Hunt, 1866-1945. Philadelphia : Lippincott

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