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【单选题】
Which of the following statements regarding the Drosophila Bar phenotype is NOT true?A.
Unequal crossing over event may give a rise to the duplication of the Bar region.
B.
The trait is inherited as a complete dominant where both homozygous and heterozygous show similar phenotype.
C.
The more Bar segment copy the fly has, the more reduced the facets in the eyes get.
D.
The Bar phenotype reflects the genetic phenomenon called gene dosage effect.
E.
The balance of gene product is critical to cell function and normal development.
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反馈参考答案：
举一反三
【简答题】谁创造了紫砂壶历史上的第二个艺术高峰?
【单选题】CRH2型动车组二级检修时，辅助电动空气压缩装置的电动机外观及安装状态良好，整流子面无污损，检查电动机碳刷长度为( )以上。
A.
10 mm
B.
15 mm
C.
20 mm
D.
25 mm
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