相关实验视频

Updated: Jan 11, 2026

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR

Frequency and Distribution of Crossovers in Caenorhabditis elegans Meiosis by SNP Genotyping using Real-time PCR

Published on: July 11, 2025

突触体复合元件冠状体调节了Drosophila melanogaster中中性交叉形成的过程

Stefanie Williams¹, Grace McKown², Zulin Yu²

¹Stowers Institute for Medical Research, Kansas City, MO, United States of America. swilliams@stowers.edu.

|November 10, 2025

概括

研究人员在Drosophila melanogaster中创建了一个新的突变等位基因,以研究科罗拉蛋白.

科学领域:

遗传学和分子生物学
细胞生物学细胞生物学
发展生物学发展生物学

背景情况:

介质变化需要同质染色体交叉才能进行适当的分离.
突触膜复合体 (SC) 对于交叉形成至关重要.
SC蛋白质是保存的,但迅速分离.

研究的目的:

为了研究SC蛋白Corolla在交叉形成中的作用.
创建和描述Drosophila melanogaster中冠状状腺的低形态等位基因.
探索SC蛋白分歧的结构和功能影响.

主要方法:

在Drosophila melanogaster中使用CRISPR/Cas9基因编辑生成了一个低形状的冠状腺基因 (冠状腺).
在不同的温度下 (18°C和25°C) 分析了SC组装,维护和交叉形成.
在冠状腺同卵性雌性中检查了染色体分离和重组率.

主要成果:

冠状腺^mau等位基因在25°C时导致SC维护和交叉形成的缺陷,导致染色体分离错误.
将温度降低到18°C挽救了SC维护和改善了重组率,尽管仍然低于野生类型水平.
在冠状腺同胞体中观察到缺乏C(3) G蛋白质的独特多复合体.

结论:

新型冠状病毒^mau等位基因提供证据表明,冠状病毒调节交叉形成.
观察到的多复合体为SC结构和蛋白质相互作用提供了新的见解.
在保持SC结构的同时,SC蛋白分歧可能会影响中介性重组.

关键词:

交叉式车辆交叉式车辆低形态的人类 (Hypomorph)介质变化 (Meiosis) 是一个过程.再组合的重组方式突触膜综合体突触膜综合体突触膜综合体

更多相关视频

Super-Resolution Microscopy of the Synaptonemal Complex Within the Caenorhabditis elegans Germline

Super-Resolution Microscopy of the Synaptonemal Complex Within the Caenorhabditis elegans Germline

Published on: September 13, 2022

Using Fluorescence In Situ Hybridization FISH to Monitor the State of Arm Cohesion in Prometaphase and Metaphase I Drosophila Oocytes

Using Fluorescence In Situ Hybridization FISH to Monitor the State of Arm Cohesion in Prometaphase and Metaphase I Drosophila Oocytes

Published on: December 6, 2017

相关概念视频

Crossing Over

Crossing Over

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...

Crossing Over

Crossing Over

Crossing over is the exchange of genetic information between homologous chromosomes during prophase I of meiosis I. Genetic recombination gives rise to allelic diversity in the newly formed daughter cells. In humans, crossing over produces genetically distinct haploid egg and sperm cells that undergo fertilization to produce unique offspring. Before cell division starts, the germ cell’s chromosome(s) undergo duplication in the S phase of the cell cycle. As the cells enter prophase I,...

Meiosis I

Meiosis I

Meiosis is a carefully orchestrated set of cell divisions, the goal of which—in humans—is to produce haploid sperm or eggs, each containing half the number of chromosomes present in somatic cells elsewhere in the body. Meiosis I is the first such division, and involves several key steps, among them: condensation of replicated chromosomes in diploid cells; the pairing of homologous chromosomes and their exchange of information; and finally, the separation of homologous chromosomes by...

Meiosis I

Meiosis I

Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...

Meiosis II

Meiosis II

Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...

Meiosis II

Meiosis II

Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each...