【单选题】设有三对独立遗传、彼此没有互作,并且表现完全显性的基因Aa、Bb、Cc,在杂合基因型个体AaBbCc(F1)自交所得的F2群体中,试求具有5显性基因和1隐性基因的个体频率,以及具有2显性性状和1隐性性状个体的频率:( )
【单选题】The loss of U.S. predominance in the world economy in the 1980s is manifested in the fact that the American______.
A.
TV industry had withdrawn to its domestic market
B.
semiconductor industry had been taken over by foreign enterprises
C.
machine-tool industry had collapsed after suicidal actions
D.
auto industry had lost part of its domestic market
【判断题】公元前5世纪之后,犹太教内部出现了很多的先知,散布弥赛亚将要降临预言。
【单选题】设有三对独立遗传、彼此没有互作、并且表现完全显性的基因Aa、Bb、Cc,在杂合基因型个体AaBbCc自交所得F2群体中,试求具有2显性性状和1隐性性状个体出现的频率( )。