2022英语周报九单元七年级答案

书面表达One possible versionDear PeterI'm writing to invite you to see the Chinese Painting Exhibition to be held in our city.The exhibition will start at 8: 30 am on Saturday and last till 5: 00 pm on Sunday in the city museum It'ssaid that a large number of Chinese paintings, some of which are original works by famous painters like ZhangDaqian and Qi Baishi, will be on display. Besides, there will be various souvenirs to be sold. I know you re veryinterested in traditional Chinese culture, so I can t wait to tell you the news and hope we can go together.Looking forward to your reply.You

4c【解析】每对等位基因测交子代的基因每出现11说明等位基因A/a和B/b的遗传遵循处寓律,A项正确;该亲本能产生四种配子,即Ab、ABaB、ab,对应比值为41:9:41:9,B项正确;综上分析,A/a和B/b两对基因位于一对同源染色体上;且在产生配子的过程中部分发生了交叉互换现象由于Ab和aB两种配子各占41%;比例较高,即这两种配子为亲本型配子,由此确定A和b基因位于一条染色体上,a和B基因位于一条染色体上,C项错误D项正确。

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