![]() ![]() So, the correct answer is 'Dorsal lip of the blastopore'. Hans Spemann and Hilde Mangold experiments proved that the dorsal lip of blastopore makes the neural tubes, cartilaginous skeletons, mesoderm etc and therefore called as the Specman's primary organizer. When the gastrula embryo is bisected by ligature with a hair loop into dorsal and ventral fragments, the half that contains the dorsal blastopore lip develops into an entire embryo, whereas the. ![]() In embryology, an organizer is the morphogenetic effect caused by one organic tissue which produces a chemical molecule that affects another part of the embryo to form a part which otherwise would not have produced. In amphibians, the organizeralso known as the SpemannMangold organizeris located in the dorsal blastopore lip of the gastrula embryo. Advertisement Advertisement New questions in Biology. The gastrula organizer, an embryonic tissue, has a central role in early development of all eumetazoans, from cnidarians to vertebrates. The research by Hans Spemann (German embryologist) and his colleague Hilde Mangold did a transplantation experiment in frogs which led to the discovery of organizers. The dorsal lip of the blastopore is a structure that forms during early embryonic development and is important for its role in organizing the germ layers. In the development of a frog embryo, the dorsal lip of the blastopore would be the spearman’s primary organizer. The newly formed zygote later goes through the mitotic divisions and forms a multicellular embryo. The embryogenesis starts with the fusion of the egg cell and sperm cell and gets fertilized, from which a zygote (diploid) is developed. Hint: The process of formation and development of an embryo is known as embryogenesis. ![]()
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