【单选题】在果蝇测交实验中,如果重组型个体占测交后代总数的16%,则( )。
A.
雌果蝇初级卵母细胞减数分裂时,有 32% 发生连锁基因间的染色单体发生互换
B.
雌果蝇初级卵母细胞减数分裂时,有 16% 的染色单体未发生互换
C.
雄果蝇初级精母细胞减数分裂时,有 16% 的染色单体发生互换
D.
雄果蝇初级精母细胞在减数分裂时,有 32% 发生连锁基因间的染色单体发生互换
【单选题】在果蝇测交实验中,如果重组型个体占测交后代总数的16%,则( )
A.
雌果蝇初级卵母细胞在减数分裂时,有16%的染色单体未发生交换
B.
雄果蝇初级精母细胞在减数分裂时,有16%的染色单体发生互换
C.
雌果蝇初级卵母细胞在减数分裂时,有16%的染色单体发生互换
D.
雄果蝇初级精母细胞在减数分裂时,有16%的染色单体未发生互换
【单选题】在果蝇测交实验中,如果重组型个体占测交后代总数的16%,则( )
A.
雌果蝇初级卵母细胞在减数分裂时,有16%的染色单体未发生互换
B.
雄果蝇初级精母细胞在减数分裂时,有16%的染色单体发生互换
C.
雌果蝇初级卵母细胞在减数分裂时有32%发生连锁基因间的染色单体发生互换
D.
雄果蝇初级精母细胞在减数分裂时有32%发生连锁基因间的染色单体发生互换
【简答题】Jerry was always in a good mood and always had something positive to say. One day, I went up to Jerry and asked him, “You can’t be a positive person all of the time. How do you do it?” Jerry replied, ...
【单选题】铅蓄电池的电解波密度一般为( )g/cm 3 。
【单选题】在果蝇测交实验中,如果重组型个体占测交后代总数的16%,则()。
A.
雌果蝇初级卵母细胞在减数分裂时,有16%的染色单体未发生BCC互换
B.
雄果蝇初级精母细胞在减数分裂时,有16%的染色单体发生互换
C.
雌果蝇初级卵母细胞在减数分裂时,有16%的染色单体发生互换
D.
雄果蝇初级精母细胞在减数分裂时,有16%的染色单体未发生互换
【简答题】My husband Sid and I were never able to have children. I had always wanted a family and that feeling 36 after his death. He was all I had. When he 37 , I felt like I had lost my entire family. I never...
【单选题】My grandfather had always taken a __________ interest in nay work, and I had an equal admiration for the stories of his time.
【单选题】My grandfather had always taken a ________ interest in my work, and I had an equal admiration for the stories of his time.