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A segmentation gene is a generic term for a gene whose function is to specify tissue pattern in each repeated unit of a segmented organism. Animals are constructed of segments; however, Drosophila segments also contain subdivided compartments. There are five gene classes which each contribute to the segmentation and development of the embryonic drosophila. These five gene classes include the coordinate gene, gap gene, pair-rule gene, segment polarity gene, and homeotic gene. In embryonic drosophila, the pair-rule gene defines odd-skipped and even-skipped genes as parasegments, showing 7 stripes in the embryo. In the next gene class, segment polarity gene, individual segments each have their own anterior and posterior pole, resulting in 14 segments. In the fruit fly Drosophila melanogaster,

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  • جينات قطبية الأجزاء (ar)
  • Segmentpolaritätsgen (de)
  • Segment polarity gene (en)
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  • جين التقسيم (segmentation gene) هو مصطلح عام للجين الذي يتمثل طوره في تحديد نمط الأنسجة في كل وحدة مكررة من الكائن الحي المجزأ. في ذبابة الفاكهة سوداء البطن، تساعد جينات قطبية الأجزاء على تحديد الأقطاب الأمامية والخلفية داخل كل الأجزاء النظيرة الجنينية عن طريق تنظيم نقل الإشارات عبر مسار وينت للإشارات ومسار هيتجهوج للإشارات. تظهر جينات قطبية الأجزاء في الجنين عقب ظهور جينات الفجوة والجينات ذات القاعدة الزوجية. ومن أكثر الأمثلة شيوعًا على هذه الجينات هي الجين المسنن وعنب الثعلب في ذبابة الفاكهة سوداء البطن. (ar)
  • Segmentpolaritätsgene bestimmen das Zellmuster und die Ausrichtung innerhalb der einzelnen Segmente von Insekten.Sie gehören zusammen mit den Lückengenen und den Paarregelgenen zu der Gruppe der zygotisch kontrollierten Segmentierungsgene. (de)
  • A segmentation gene is a generic term for a gene whose function is to specify tissue pattern in each repeated unit of a segmented organism. Animals are constructed of segments; however, Drosophila segments also contain subdivided compartments. There are five gene classes which each contribute to the segmentation and development of the embryonic drosophila. These five gene classes include the coordinate gene, gap gene, pair-rule gene, segment polarity gene, and homeotic gene. In embryonic drosophila, the pair-rule gene defines odd-skipped and even-skipped genes as parasegments, showing 7 stripes in the embryo. In the next gene class, segment polarity gene, individual segments each have their own anterior and posterior pole, resulting in 14 segments. In the fruit fly Drosophila melanogaster, (en)
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  • جين التقسيم (segmentation gene) هو مصطلح عام للجين الذي يتمثل طوره في تحديد نمط الأنسجة في كل وحدة مكررة من الكائن الحي المجزأ. في ذبابة الفاكهة سوداء البطن، تساعد جينات قطبية الأجزاء على تحديد الأقطاب الأمامية والخلفية داخل كل الأجزاء النظيرة الجنينية عن طريق تنظيم نقل الإشارات عبر مسار وينت للإشارات ومسار هيتجهوج للإشارات. تظهر جينات قطبية الأجزاء في الجنين عقب ظهور جينات الفجوة والجينات ذات القاعدة الزوجية. ومن أكثر الأمثلة شيوعًا على هذه الجينات هي الجين المسنن وعنب الثعلب في ذبابة الفاكهة سوداء البطن. (ar)
  • Segmentpolaritätsgene bestimmen das Zellmuster und die Ausrichtung innerhalb der einzelnen Segmente von Insekten.Sie gehören zusammen mit den Lückengenen und den Paarregelgenen zu der Gruppe der zygotisch kontrollierten Segmentierungsgene. (de)
  • A segmentation gene is a generic term for a gene whose function is to specify tissue pattern in each repeated unit of a segmented organism. Animals are constructed of segments; however, Drosophila segments also contain subdivided compartments. There are five gene classes which each contribute to the segmentation and development of the embryonic drosophila. These five gene classes include the coordinate gene, gap gene, pair-rule gene, segment polarity gene, and homeotic gene. In embryonic drosophila, the pair-rule gene defines odd-skipped and even-skipped genes as parasegments, showing 7 stripes in the embryo. In the next gene class, segment polarity gene, individual segments each have their own anterior and posterior pole, resulting in 14 segments. In the fruit fly Drosophila melanogaster, segment polarity genes help to define the anterior and posterior polarities within each embryonic parasegment by regulating the transmission of signals via the Wnt signaling pathway and Hedgehog signaling pathway. Segment polarity genes are expressed in the embryo following expression of the gap genes and pair-rule genes. The most commonly cited examples of these genes are engrailed and gooseberry in Drosophila melanogaster. The segment polarity is the last step in embryonic development and a repeated pattern where each half of each segment is deleted and a mirror-image is duplicated and reversed to replace that half segment; thus, forming a pattern element. (en)
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