関連する実験動画
Updated: Aug 5, 2026

10:10
Drosophila Larval NMJ Immunohistochemistry
Published on: March 28, 2009
ドロソフィラの腹部付属体の基本状態
1Department of Biochemistry and Molecular Biophysics, Columbia University, 701 West 168 Street, New York, NY 10032, USA.
まとめ
フルーツハエでは,共通の前体から付属体が発達する. 特定の遺伝的指示がなければ,これらの付属体は単純な2つのセグメントの足を形成し,足の発達のための進化の経路を示唆します.
科学分野:
- 発達生物学 発達生物学とは
- 進化生物学の進化生物学について
- 遺伝学 遺伝学とは
背景:
- フルーツハエ (Drosophila melanogaster) は,アンテナや足のような連続的に同類な腹部付属体を備えています.
- これらの付属体は,ユニークなセレクター遺伝子によって区別され,共通の発達基礎状態を暗示しています.
- この基本状態を理解することは,付属体の多様性を説明する鍵です.
研究 の 目的:
- 選択遺伝子の活性が欠けているとき,ドロソフィラ・メラノガスターの腹部付属体の形態を調査する.
- 様々な付属が生じる共通基盤状態の性質を決定する.
主な方法:
- ドロソフィラ・メラノガスターの遺伝子操作で,セレクター遺伝子活性を排除する.
- その結果生じる腹部付属体の形状の分析,近距離軸に沿ったセグメンテーションに焦点を当てた.
主要な成果:
- 選択遺伝子の活動なしに形成された腹部付属体は,足のような構造を示します.
- これらの足のような付属体は単純化され,2つのセグメントのみで構成されています:近辺セグメントと遠端タルサス.
結論:
- 選択遺伝子の欠如で形成された足のような付属体は,基本的な基本的状態を表しています.
- この発見は,足のような付属体が,選択遺伝子の活性を必要としない前駆体から進化した可能性があることを示唆しています.
関連する概念動画
The Thoracic Cage: Sternum
The thoracic or rib cage forms the body's thorax (chest) portion. Its primary function in the body is to protect vital organs in the thoracic cavity, such as the heart and the lungs. It consists of 12 pairs of ribs with their costal cartilages and the sternum. The ribs are anchored posteriorly to the 12 thoracic vertebrae (T1-T12).
The sternum is the elongated bony structure on the anterior side of the thoracic cage. It consists of three parts: the manubrium, the body, and the xiphoid process.
The sternum is the elongated bony structure on the anterior side of the thoracic cage. It consists of three parts: the manubrium, the body, and the xiphoid process.
Peritoneum
The peritoneum is a vital membrane that lines the abdominal cavity and covers most of the organs within it. It plays a crucial role in protecting the organs, providing a smooth surface for their movement, and facilitating various physiological processes. Understanding the anatomy and function of the peritoneum is essential for comprehending the complexities of the abdominal region.
Anatomy of the Peritoneum
The peritoneum is divided into two layers: the parietal peritoneum and the visceral...
Anatomy of the Peritoneum
The peritoneum is divided into two layers: the parietal peritoneum and the visceral...
Gross Anatomy of the Stomach
The human stomach is a vital part of the digestive system, performing multiple functions. It is located within the peritoneum, a serous membrane that lines the abdominal cavity. The stomach plays a central role in processing food substances and interacts with other digestive organs through coordinated digestive processes. The stomach has a characteristic J-shape and is divided into four main regions. The cardia is the first section where the esophagus connects to the stomach and is the entry...
Gross Anatomy of the Liver
The liver, the largest gland within the human body, is a firm and reddish-brown organ. This wedge-shaped structure weighs approximately 1.5 kg and occupies a significant portion of the right hypochondriac and epigastric regions. It extends more to the right of the body's midline than to the left.
Located under the diaphragm, the liver is almost entirely ensconced within the rib cage, providing it with substantial protection. Except for the superior most bare area, the liver's surface is covered...
Located under the diaphragm, the liver is almost entirely ensconced within the rib cage, providing it with substantial protection. Except for the superior most bare area, the liver's surface is covered...
Pancreas
The pancreas, an essential organ in the human body, is a pinkish-gray elongated structure located posterior to the stomach. It extends laterally from the duodenum towards the spleen and is firmly bound to the posterior wall of the abdominal cavity. The organ's surface has a lumpy, lobular texture that gives it a unique appearance.
The broad head of the pancreas lies within the loop formed by the duodenum, while its slender body reaches towards the spleen. The tail of the pancreas is short and...
The broad head of the pancreas lies within the loop formed by the duodenum, while its slender body reaches towards the spleen. The tail of the pancreas is short and...
Ovaries
The ovaries are roughly the size of almonds and measure approximately 2 to 3 centimeters in length. These paired structures are situated within the pelvic region and are anchored by the mesovarium—a peritoneal extension that also connects them to the wider structure of the broad ligament. The support system extends to the suspensory ligament, housing blood and lymphatic vessels. In addition, the ovarian ligament tethers the ovaries to the uterus.
On the ovarian surface, a layer of cuboidal...
On the ovarian surface, a layer of cuboidal...

