1.非选择题- (共3题)
杂交组合 | 亲本表现型 | 后代 | |
腋生 | 顶生 | ||
一 | 顶生×顶生 | 0 | 804 |
二 | 腋生×腋生 | 651 | 207 |
三 | 顶生×腋生 | 295 | 265 |
(1)根据组合________可判断出豌豆花腋生和顶生中,显性性状是________(顶生,腋生)。
(2)组合二亲本的遗传因子组成分别是________、________,其后代腋生中杂合子比例为________。
(3)组合三后代的腋生豌豆中杂合子占________。

(1)若杂交实验中,子代有立耳垂背、立耳中垂背、立耳直背,其数量比为1∶2∶1,则亲本的基因型组合是__________。
(2)若杂交实验中,子代有半立耳中垂背、立耳中垂背、半立耳直背、立耳直背,其数量比为1∶1∶1∶1,则亲本的基因型组合是:____________或_____________。
Ⅱ、家蚕的黑色卵(B)对白色卵(b)为显性,绿茧(D)对黄茧(d)为显性,已知这两对等位基因都位于常染色体上,其中B和b位于第2号染色体上,现有纯合黑卵黄茧和白卵绿茧未交配过的雌雄蚕若干,请你设计实验方案,探究D和d是否也在第2号染色体上。(不考虑基因突变、交叉互换等)
实验目的:探究D和d是否在第2号染色体上。
方法步骤:
第—步:用上述两个纯合亲本杂交得到F1。
第二步:__________________,统计后代的表现型及比例。
预期结果及结论:
若_________________,则说明D和d不在第2号染色体上。
若_________________,则说明D和d在第2号染色体上。
I.红眼雌果蝇与白眼雄果蝇交配,F1全是红眼。根据所学知识回答:
①若F1互交,则所得F2的基因型有________种,F2的表现型有________种
②F2的卵细胞及精子中具有A和a的比例分别是________和________。
Ⅱ.红眼长翅的雌果蝇与红眼长翅的雄果蝇交配,后代的表现型及比例如下表:
表现型 | 红眼长翅 | 红眼残翅 | 白眼长翅 | 白眼残翅 |
雄果蝇 | 3 | 1 | 3 | 1 |
雌果蝇 | 3 | 1 | 0 | 0 |
②若对雌性亲本测交,所得后代雌雄的比例为__________。后代中与母本表现型相同的个体占后代总数的________(不考虑性别)。
2.单选题- (共10题)

A.图Ⅰ表示的细胞中有 8 条染色体、3 对同源染色体 |
B.图Ⅱ表示的细胞中没有同源染色体 |
C.a、b、c、d 染色体的组成各不相同 |
D.图Ⅲ可能是 4 个精细胞,也可能是 1 个卵细胞和三个极体 |
A.青蛙的红细胞在无丝分裂过程中无DNA复制 |
B.基因的分离、自由组合定律,可以在配子形成过程中同时起作用 |
C.进行减数分裂的动物细胞,等位基因的分离和非等位基因自由组合发生在初级精(卵)母细胞中 |
D.原核细胞不进行减数分裂,它的遗传不遵循孟德尔的遗传定律 |

A.乙产生的子细胞基因型为AaBbCC,丙产生的细胞基因型为ABC和abc |
B.甲、乙、丙三个细胞中均含有6条染色体,但只有丙中不含同源染色体 |
C.甲细胞形成乙细胞和丙细胞是同一细胞分裂方式过程中的不同阶段 |
D.丙细胞产生子细胞的过程中发生了等位基因的分离和非等位基因自由组合 |

A.精子正常、卵细胞异常,后代多一条染色体,患21三体综合征,但不患色盲 |
B.精子和卵细胞均异常,后代染色体正常,患色盲 |
C.精子异常,卵细胞正常,后代性染色体比正常人少,患性腺发育不良,不患色盲 |
D.精子、卵细胞染色体均正常,后代染色体正常,患色盲 |
A.AaXBY、AaXBXb | B.AaXBY、aaXbXb |
C.AAXbY、AAXBXb | D.AaXBY、aaXBXb |

A.1∶1∶1∶1 | B.3∶1∶3∶1 | C.2∶2∶1∶1 | D.9∶3∶3∶1 |
①选作杂交实验的两个亲本一定要是纯种 ②选定的一对相对性状要有明显差异
③一定要让显性性状作母本 ④一定要实现两个亲本之间的有性杂交
⑤杂交时,需在开花前除去母本的雌蕊
A.①②③④⑤ | B.①②④ | C.③④⑤ | D.①②⑤ |

A.M的孩子是b,N的孩子是c | B.M的孩子是c,N的孩子是b |
C.M的孩子是d,N的孩子是a | D.M的孩子是d,N的孩子是b |
A.3∶1符合基因的分离定律 |
B.单眼皮与双眼皮不是由一对遗传因子决定的 |
C.含有隐性遗传因子的精子容易和含有显性遗传因子的卵子结合 |
D.这对夫妇都含有单眼皮遗传因子,每一胎中都有出现单眼皮的可能,其概率为1/4 |
3.选择题- (共3题)
Today’s young people are taking a more active part in online activities. Although the Internet can be 1for students to collect information and communicate(交流)with their friends, teachers and parents are becoming more and more 2 about the unhealthy web content(网上内容)in the bar. They think that the birth of “Harm-free Internet Bars”(健康网吧)is3 step to4teenagers.
It was Sunday afternoon and there were not many 5 seats left in the Feiyu Internet Bar. A few6 were found playing 7. A person of the bar was walking around 8 Internet users’ online activities.
“My job is to find anyone who is looking at9 websites and then 10them from doing so,” he said. “This is a 11 of the ‘Harm-free Internet Bar’project”. Feiyu, a famous Internet bar in Beijing is among the first 19 to12 the harm-free Internet bar club.
In order to help start a better 13 for teenagers’ online activities, China’s Communist Youth League has brought out the program named “Harm-free Internet Bar for Teens”.
But while teachers and parents14the “harm-free Internet bars”,15 do many school students think of them?
Today’s young people are taking a more active part in online activities. Although the Internet can be 1for students to collect information and communicate(交流)with their friends, teachers and parents are becoming more and more 2 about the unhealthy web content(网上内容)in the bar. They think that the birth of “Harm-free Internet Bars”(健康网吧)is3 step to4teenagers.
It was Sunday afternoon and there were not many 5 seats left in the Feiyu Internet Bar. A few6 were found playing 7. A person of the bar was walking around 8 Internet users’ online activities.
“My job is to find anyone who is looking at9 websites and then 10them from doing so,” he said. “This is a 11 of the ‘Harm-free Internet Bar’project”. Feiyu, a famous Internet bar in Beijing is among the first 19 to12 the harm-free Internet bar club.
In order to help start a better 13 for teenagers’ online activities, China’s Communist Youth League has brought out the program named “Harm-free Internet Bar for Teens”.
But while teachers and parents14the “harm-free Internet bars”,15 do many school students think of them?
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【1】题量占比
非选择题:(3道)
单选题:(10道)
选择题:(3道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:1
5星难题:0
6星难题:10
7星难题:0
8星难题:1
9星难题:1