英语周报2022-2023高一23答案

英语周报2022-2023高一23答案已经整理完毕，供同学们学习参考，更多英语周报答案，请关注本站。

答案】A解折】根据F2表现型及比例可知,Ef维配子致死,因此F2中不存在基因型为Ef的个体,F2中量叶基因型只能是Ee,产生的雄配子只能为ef,黄叶雌株eef产生的雌配子为ef,则后代全部叶,A项正确;由分析可知,F2异常比例的出现最可能的原因是基因型为E的雄配子致死,B产生的配子为BFEF,且比例为1:1:1:1,由于E雄配子致死,产生的雄配d且比为1:1:1,F中红叶植株EF不可存活,能存活的为 EeFf EeFF、EF基因型,且比例为EeF:EeFF:EEF=3:2:1,其中与F1基因型(EeFf)相同的植株所占比3C项错误F中植株的基因型及比例为cFF:e=1:2,纯合紫叶植株:杂合紫叶植8:1:2,D项错误。

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

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