德洛索菲拉性致命基因在生殖线祖先中启动女性发育
Kazuya Hashiyama1, Yoshiki Hayashi, Satoru Kobayashi
1Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institutes of Natural Sciences, Higashiyama, Myodaiji, Okazaki 444-8787, Japan.
概括
性致命 (Sxl) 基因在Drosophila原始生殖细胞 (PGC) 中自主作用,启动女性发育. XX PGCs中的过渡性Sxl表达对女性命运是必要的,而XY PGCs中的宫外表达可以诱导子宫生成.
科学领域:
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
- 德洛索菲拉 (Drosophila melanogaster) 的研究研究
背景情况:
- 在Drosophila中,性别决定涉及体质和细胞自主性线索.
- 在原始生殖细胞 (PGC) 中启动性发育的细胞自主机制在很大程度上是未知的.
研究的目的:
- 调查细胞自主因素在Drosophila PGCs中启动女性性发育中的作用.
- 确定性致死性 (Sxl) 基因是否在PGC中起作用,以确定女性生殖系命运.
主要方法:
- 在迁移的Drosophila PGC中分析性致死性 (Sxl) 基因表达模式.
- 在XX和XYPGC中对Sxl表达的实验操纵.
- 在移植到宿主后对PGC的功能性评估.
主要成果:
- 性致命性 (Sxl) 在性腺迁移期间在XX原始生殖细胞 (PGC) 中暂时表达.
- 发现PGC中的Sxl表达对于启动女性生殖线发育至关重要.
- 宫外Sxl表达在XY PGC中诱导了移植后的产卵和功能性卵子生产.
结论:
- 性致死性 (Sxl) 基因在Drosophila PGC中自主运作,启动女性生殖系命运.
- Sxl作为一个关键的分子开关,用于生殖线的性发育.
- 这些发现阐明了PGC性差异化中的关键细胞自主机制.
相关概念视频
The 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...
Dosage Compensation
In animals, gender is determined by the number and type of sex chromosome. For example, human females have two X chromosomes, and males have one X and one Y chromosome, whereas C.elegans with one X chromosome is a male, and the one with two X chromosomes is a hermaphrodite.
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will have...
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will have...
Background and Environment Affect Phenotype
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...


