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Updated: Jun 11, 2025

Dissection of Larval Zebrafish Gonadal Tissue
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Dissection of Larval Zebrafish Gonadal Tissue

Published on: April 26, 2017

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人口基因组分析揭示了Apostichopus japonicus的多基因性别确定系统

Chunxi Jiang1,2,3,4, Shilin Liu1,2,3,4, Yujia Yang5

  • 1CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.

iScience
|October 9, 2024
PubMed
概括

海Apostichopus japonicus有一个复杂的多基因性别确定 (PSD) 系统,而不是一个简单的XX/XY机制. 这项研究确定了在这种水产养殖物种中用于分子性别识别的候选基因和标记物.

关键词:
生物科学 生物科学发育生物学是发展生物学.进化发育生物学 进化发育生物学基因组学就是基因组学.动物学 动物学

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The Ratio of X Chromosome to Autosomes02:45

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...
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Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
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Evolution
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Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...
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