2021~2022学年第二学期高一年级期中考试·生物
参考答案、提示及评分细则
1.B2.C3.D4.D5.A6.C7.A8.C9.A10.D11.D12.A13.B14.A15.B16.D
17.C18.B19.C20.D21.A22.B23.C24.D25.B
26.(除注明外,每空1分,共10分)
(1)单位时间内的氧气释放量、有机物的积累量(任写一点)控制无关变量,避免无关变量对实验结果的
影响
(2)基质C
(3)呼吸作用丁
(4)光合作用等于呼吸作用(净光合作用为0,2分)甲色素含量,酶的数量等(写出两点,合理即可)
27.(除注明外,每空1分,共10分)
(1)初级精母细胞AaBb(2分)N
(2)在纺锤丝的牵引下同源染色体分离,分别移向细胞两极(合理即可,2分)
(3)00(第二)极体和卵细胞(2分)
28.(除注明外,每空1分,共10分)
(1)染色休染色单体次级精母细胞减数第二次分裂前、中期
(2)同源染色体排列在赤道板上
(3)i→2n
(4)染色体、染色单体和核DNA数目的变化相同(合理即可,2分)精细胞的形成过程细胞质均等分裂,一
个精原细胞最终产生4个精细胞,而卵细胞形成的过程有细胞质不均等分裂,一个卵原细胞最终产生】个
卵细胞(合理即可,2分)
29.(除注明外,每空2分,共10分)
(1)自由组合(1分)
(2)74/9
(3)AABB、aabb
(4)aabb(1分)白眼:红眼=3:1
30.(除注明外,每空1分,共10分)
(1)AaXWY 4
(2)正常翅、白眼AaXX3:1
(3)实验思路:选取一只正常红眼雄果蝇与该雌果蝇交配,统计后代的表型及比例(2分)
预期结果:若后代雌果蝇均为红眼,雄果蝇均为白眼,说明该变异是基因突变;若后代雌果蝇中有红眼和白
眼,说明该变异是染色体(数目)变异(答案合理即可,3分)
【高一年级期中考试·生物参考答案】
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