Appendages may become uniramous, as in insects and centipedes, where each appendage comprises a single series of segments, or it may be biramous, as in many crustaceans, where each appendage branches into two sections. Triramous (branching into three) appendages are also possible.[1]
All arthropod appendages are variations of the same basic structure (homologous), and which structure is produced is controlled by "homeobox" genes. Changes to these genes have allowed scientists to produce animals (chiefly Drosophila melanogaster) with modified appendages, such as legs instead of antennae.[2]
ReferencesEdit
^Morris, Simon Conway (1979). "The Burgess Shale (Middle Cambrian) Fauna". Annual Review of Ecology and Systematics. 10: 327–349. doi:10.1146/annurev.es.10.110179.001551. JSTOR 2096795. Retrieved 17 November 2020.
^Emerald, B. Starling; Cohen, Stephen (March 2004). "Spatial and temporal regulation of the homeotic selector gene Antennapedia is required for the establishment of leg identity in Drosophila". Developmental Biology. 267 (2): 462–472. doi:10.1016/j.ydbio.2003.12.006. PMID 15013806.
appendage, appendages, successors, execute, channel, program, circa, survive, look, appendage, wiktionary, free, dictionary, appendage, outgrowth, external, body, part, natural, prolongation, that, protrudes, from, organism, body, beetle, legin, arthropods, ap. For I O appendages in OS 360 and successors see Execute Channel Program Appendages For the EP by Circa Survive see Appendage EP Look up appendage in Wiktionary the free dictionary An appendage or outgrowth is an external body part or natural prolongation that protrudes from an organism s body A beetle legIn arthropods an appendage refers to any of the homologous body parts that may extend from a body segment including antennae mouthparts including mandibles maxillae and maxillipeds gills locomotor legs pereiopods for walking and pleopods for swimming sexual organs gonopods and parts of the tail uropods Typically each body segment carries one pair of appendages An appendage which is modified to assist in feeding is known as a maxilliped or gnathopod citation needed In vertebrates an appendage can refer to a locomotor part such as a tail fins on a fish limbs legs flippers or wings on a tetrapod exposed sex organ defensive parts such as horns and antlers or sensory organs such as auricles proboscis trunk and snout and barbels citation needed Appendages may become uniramous as in insects and centipedes where each appendage comprises a single series of segments or it may be biramous as in many crustaceans where each appendage branches into two sections Triramous branching into three appendages are also possible 1 All arthropod appendages are variations of the same basic structure homologous and which structure is produced is controlled by homeobox genes Changes to these genes have allowed scientists to produce animals chiefly Drosophila melanogaster with modified appendages such as legs instead of antennae 2 References Edit Morris Simon Conway 1979 The Burgess Shale Middle Cambrian Fauna Annual Review of Ecology and Systematics 10 327 349 doi 10 1146 annurev es 10 110179 001551 JSTOR 2096795 Retrieved 17 November 2020 Emerald B Starling Cohen Stephen March 2004 Spatial and temporal regulation of the homeotic selector gene Antennapedia is required for the establishment of leg identity in Drosophila Developmental Biology 267 2 462 472 doi 10 1016 j ydbio 2003 12 006 PMID 15013806 See also EditAppendicular skeleton nbsp This animal anatomy related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Appendage amp oldid 1171072010, wikipedia, wiki, book, books, library,
