Halteres
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In Diptera, the formation of the haltere during metamorphosis is dependent on the homeotic gene Ultrabithorax (Ubx). If this gene is experimentally deactivated, the haltere will develop into a fully developed wing. This is an excellent illustration of an important mechanism of evolutionary development; a simple homeotic gene change can result in a radically different phenotype. Halteres flap up and down as the wings do and operate as vibrating structure gyroscopes.…mehr

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In Diptera, the formation of the haltere during metamorphosis is dependent on the homeotic gene Ultrabithorax (Ubx). If this gene is experimentally deactivated, the haltere will develop into a fully developed wing. This is an excellent illustration of an important mechanism of evolutionary development; a simple homeotic gene change can result in a radically different phenotype. Halteres flap up and down as the wings do and operate as vibrating structure gyroscopes. Every vibrating object tends to maintain its plane of vibration if its support is rotated, a result of the Coriolis effect. If the body of the insect changes direction in flight or rotates about its axis, the vibrating halteres thus exert a force on the body. The insect detects this force with sensory organs known as campaniform sensilla located at the base of the halteres.