问答题

解释互补实验，并以曲霉菌的腺嘌呤突变体1、2和3为例，设计实验说明三种突变体是否属于同一个基因的突变。

【参考答案】

检测两个突变体的突变基因作用方式的试验。同一表型的不同突变体的杂交后代，突变基因杂合的顺式结构都能互补。而反式结构不能互......

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A female-male mosaic fruit fly may be formed, if there is chromosome loss or______．
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问答题
In an inversion heterozygote. one of its chromosomes shows the following linkage relationship: In the homologous chromosome, there exists an inversion in the region (1)What type of inversion is it (2)Please draw a synaptic scheme(联会图)of these two chromosomes. (3)If in the inverted chromosome region there is a lethal gene D at d locus, and in the normal(i.e., without inversion)chromosome there is another lethal gene F at f locus. How much of F1 individuals will be double(both at d and f loci) heterozygote when the inversion heterozygote self-crosses Why
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