相关实验视频
Updated: Jul 8, 2026
09:50
Live Imaging of Drosophila Larval Neuroblasts
Published on: July 7, 2014
概括
胚胎中的阿玛迪略基因突变会导致细分极性缺陷. 细胞命运的变化是自主性的,但极性逆转需要细胞相互作用.
科学领域:
- 发育生物学是发展生物学.
- 遗传学 遗传学 是一个
- 细胞生物学 细胞生物学
背景情况:
- armadillo 基因对于胚胎发育至关重要.
- armadillo 中的突变导致了细分极性表型.
研究的目的:
- 为了研究甲动物突变现象型的细胞自主性.
- 为了确定细胞相互作用在细分极性中的作用.
主要方法:
- 线索性重组被用来诱导半双胞胎胚胎中的同卵性甲鸟斑.
- 对突变克隆细胞命运和极性进行分析.
主要成果:
- 双胞胎甲鸟细胞自主形成带有逆极性的牙.
- 克隆衍生补丁没有表现出极性逆转,这表明细胞相互作用依赖.
- 在后部区域观察到有限的克隆形成.
结论:
- 在细胞命运决定中的阿马迪略的作用是细胞自主.
- 细胞相互作用对于在甲鸟突变胚胎中建立细分极性逆转至关重要.
相关概念视频
02:32Position-effect Variegation
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
02:45The Ratio of X Chromosome to Autosomes
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...