32.(1)分离(1分)(2)不能(1分)3实验设计:选择子代中的灰体雌果蝇与灰体雄果蝇进行杂交(或选择子代中的黄体雌果蝇与黄体雄果蝇进行杂交)(2分)预期实验结果:若子一代中所有的雌果蝇都表现为灰体,雄果蝇中一半表现为灰体,另一半表现为黄体则控制果蝇灰体和黄体的基因位于Ⅹ染色体上,且灰体为显性性状,黄体为隐性性状(2分);若子一代中灰体:黄体:灰体:黄体=3:1:3:1,则控制果蝇灰体和黄体的基因位于常染色体上,且灰体为显性性状,黄体为隐性性状(2分);若子一代中全部为灰体果蝇,则控制果蝇灰体和黄体的基因位于常染色体上,且黄体为显性性状,灰体为隐性性状(2分)(或若子一代中所有的雌果蝇都表现为黄体,雄果蝇中一半表现为灰体,另一半表现为黄体,则控制果蝇灰体和黄体的基因位于Ⅹ染色体上,且黄体为显性性状,灰体为隐性性状;若子一代中早灰体:早黄体:灰体:黄体=1:3:1:3,则控制果蝇灰体和黄体的基因位于常染色体上,且黄体为显性性状,灰体为隐性性状;若子一代中全部为黄体果蝇,则控制果蝇灰体和黄体的基因位于常染色体上,且灰体为显性性状,黄体为隐性性状)(6分
第二节书面表达【写作思路】根据试题要求,考生需要写一篇记叙文,记述身边一位值得尊敬和爱戴的人。首先考生需要介绍自己最尊敬和爱戴的人是谁,简单地介绍一下他(她)。然后,陈述为什么他(她)值得尊敬和爱戴。最后,可以对前文进行一个总结,使文章结构严谨。本文的写作重点在"尊敬和爱戴的原因",考生可围绕这个要点适当拓展,从性格特点、处事风格等方面展开写作。【范文赏读】The most beloved and respected person around me is my teacher, Ms LiThough she has been teaching English for twenty years, she is still passionateabout teaching. She is kind and considerate towards us just like our dear motherWe all respect her because she always tries new ways to make her classes livelyand interesting. Hardworking and knowledgeable, she is one of the best teachersin our school. When we have a problem, we will turn to her for help. She alwaystalks to us patiently and helps us to find a solution. In our eyes, she is not onlyour teacher, but also our best friend. Those are why she deserves our respect【亮点词句】亮点词汇: beloved, respected, be passionate about, be consideratetowards, turn to sb. for help, in one's eyes亮点句式:Why引导的表语从句( why she deserves our respect)
以上就是2021-2022 英语周报 八年级 新目标 1WHE答案,更多英语周报答案请关注本网站。
本文地址: http://www.ncneedu.cn/post/17199.html
文章来源:admin
版权声明:除非特别标注,否则均为本站原创文章,转载时请以链接形式注明文章出处。
2023-04-05admin
2023-04-05admin
2023-04-05admin
2023-04-05admin
2023-04-05admin
2023-04-05admin
2023-02-24admin
2023-02-24admin
2023-02-24admin
2023-02-24admin
扫码二维码
获取最新动态