问答题
Male sterility maintenance line
【参考答案】
雄性不育保持系指与雄性不育系杂交后,仍能保持不育系的雄性不育特征的品系,其细胞质和细胞核基因的组合是N(rfrf)。
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问答题
Variegated type of position effect
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单项选择题
In a strain of fruit fly, after several times of artificial hybridizations, the map distances of the given loci is A-B=10 m.u., A-C=20 m.u., A-D=25 m.u., B-C=30 m.u., B-D=15 m.u., If the genetic map is drawn according to these humbers, the correct locus order should be ______.
A.DCBA
B.DBAC
C.CADB
D.ACDB
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