2021-2022英语周报高邑课标41期答案

6.D【关键能力】分析推理能力、计算能力【解题思路】由图分析可知，3号和4号正常，其儿子8号患病，符合“无中生有为隐性”的特点，但仅从所给信息不能推断出该病是常染色体隐性遗传病还是伴X染色体隐性遗传病，A错误。假设该病由A、a控制，则4号的基因型为Aa或XX,由于2号患病，基因型为aa或XX”,则4号的致病基因一定来自2号，不可能来自1号，B错误。若该病是常染色体隐性遗传病，则5号的基因型为Aa,9号的基因型为1/3AA、2/3Aa,二者基因型相同的概率为2/3：若该病是伴X染色体隐性遗传病，则5号的基因型是XX,9号的基因型是1/2XX、1/2XX°，二者基因型相同的概率是1/2,C错误。若1号携带致病基因，则该病是常染色体隐性遗传病，6号的基因型是aa,该病在人群中的发病率为1/40000，a的基因频率为1/200，A的基因频率为1-1/200=199/200，正常人群中，Aa所占的比例为(2×1/200×199/200)/(199/200×199/200 2×1/200×199/200)=2/201,因此，6号和7号生一患病男孩的概率是2/201×1/2×1/2=1/402，D正确。

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)

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