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相关概念视频

Position-effect Variegation02:32

Position-effect Variegation

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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.
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X-Inactivation01:58

X-Inactivation

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The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.
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Crossing Over01:34

Crossing Over

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Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process...
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Polytene Chromosomes02:04

Polytene Chromosomes

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Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also...
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Gene Conversion02:08

Gene Conversion

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Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
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The Ratio of X Chromosome to Autosomes02:45

The Ratio of X Chromosome to Autosomes

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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...
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相关实验视频

Updated: Jan 13, 2026

Imaging and Analysis of Tissue Orientation and Growth Dynamics in the Developing Drosophila Epithelia During Pupal Stages
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Imaging and Analysis of Tissue Orientation and Growth Dynamics in the Developing Drosophila Epithelia During Pupal Stages

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在猫的摇篮中捕捉基因细胞二元性.

Anna Laddach1, Fränze Progatzky1,2, Vassilis Pachnis1

  • 1Nervous System Development and Homeostasis Laboratory, The Francis Crick Institute, NW1 1AT, London, United Kingdom.

Bioinformatics (Oxford, England)
|January 11, 2026
PubMed
概括

猫摇篮是用于单细胞分析的新R包. 它有助于将基因和细胞聚集在一起,可视化它们之间的关系,以获得更深入的生物学见解.

科学领域:

  • 计算生物学 计算生物学
  • 生物信息学是一种生物信息学.
  • 基因组学就是基因组学.

背景情况:

  • 单细胞分析对于理解细胞异质性至关重要.
  • 探索基因表达模式和细胞类型之间的关系是一个关键的挑战.

研究的目的:

  • 介绍CatsCradle,这是一个R包,旨在进行高级单细胞数据分析.
  • 为探索细胞和基因表达之间的二元性提供工具.

主要方法:

  • 猫摇篮利用了细胞及其表达的基因之间的固有二元性.
  • 它提供了聚类基因和可视化基因-基因关系的功能.
  • 该软件包有助于探索基因群和细胞群之间的联系.

主要成果:

  • 该包允许识别基因表达程序.
  • 它允许可视化这些程序如何与不同的细胞类型相关.
  • 用户可以在单细胞数据集中探索复杂的关系.

结论:

  • CatsCradle是一个有价值的R包,用于单细胞RNA测序数据分析.
  • 它增强了对基因细胞表达关系的理解.

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Imaging and Analysis of Tissue Orientation and Growth Dynamics in the Developing Drosophila Epithelia During Pupal Stages

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Cell Lineage Analyses and Gene Function Studies Using Twin-spot MARCM
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Cell Lineage Analyses and Gene Function Studies Using Twin-spot MARCM

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An Optogenetic Method to Control and Analyze Gene Expression Patterns in Cell-to-cell Interactions

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  • 该软件包与现有的单细胞数据结构如Seurat.com无集成.