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相关概念视频

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 Drosophila...

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Accurate and Phenol Free DNA Sexing of Day 30 Porcine Embryos by PCR
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人类堕胎的性别通过核性别测定胆小的细胞来确定.

A C STEVENSON, R H MCCLARIN

    Nature
    |July 27, 1957
    PubMed
    概括

    No abstract available in PubMed .

    关键词:
    堕胎 堕胎 堕胎性别特征 性别特征

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