2023湖南省郴州市高三下学期第三次教学质量监测地理答案

32.考查目标本题考查伴性遗传和变异的知识,旨在考查考生的理解能力、实验与探究能力和综合运用能力。思路点拨(1)常染色体的某一片段移接到W染色体上,属于染色体结构变异中的易位。变异家蚕的基因型为AOZW,由于没有A或a基因的配子不育,故变异家蚕在减数分裂中能产生基因型为A、AW、OWλ3种可育配子。(2)普通白卿雄蚕的基因型为a/Z,其与限性雌蚕交配,子代在卵期即可进行雌雄筛选,说明限性雌蚕含有A基因,且A基因位于性染色体上,结合变异家蚕的基因型,可推知限性雌蚕的基因型为aZW。其培育过程如图所示:变异家蚕(AOZW)×普通白卵雄蚕(an/Z)F1黑卿雄蚕(AaZ)黑卵雌蚕(aOZW)黑卵雌蚕(AaZW3)普通白卵雄蚕(anZ)F2限性黑卵雌蚕(aZW)黑卵雌蚕(aOZW)白卵雄蚕(anZ)参考答案(除注明外,每空2分,共11分)(1)染色体结构变异(或染色体变异或易位,1分)3(2)aa/waO/W黑该雌蚕的显性基因只位于W染色体上,其显性性状只能遗传给雌性子代

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)

18G3分)C19分)D20.6分)①樱花谢了杜鹃开;②日渐茂盛起来。(每点3分,意思对即可,超过字数扣1分)