2022英语周报高考提升版答案

写作Paragraph lAnd not very long after that, he made a surprising decision. Hedecided to use all hghts to prepare for his li fe at the remoteisland. In the first year he sent troops, veterinarians and animalrainers to kill the wild animals or train them for good use. Thetask was so huge but it was wor thwhile then the king sent a lot offarmers to start a wide rice field and began to grow rice. Next head many facilities, from hospi tal to school, built.【高分句型一】After that he sent a lot of educated people there. At last he sentall his families to the island.(岛屿的建设和发展)Paragraph 2Finally the time came when the king had to be thrown away to thesland.【高分句型二】 Wi th many strong soldiers catching him,hesmiled. He had prepared every thing for the final day.When he was sent to the island, the is land had taken on a new lookEverybody there lived a comfortable life and the king was welcomedwarmly by his people. They cheered, long live the wise kingThe wise king lived happily ever after. The clever people live nown the world to prepare for their life in the future.(国王最终在自己的岛屿上生活)

32.(11分)【答案】(1)一对或两对(2分)双亲均只含一对等位基因,两对基因无论是否在一对同源染色体上,双亲产生的配子的种类和比例相同,杂交后代中红花与白花的北值都为1:3(必须答出“双亲均只含一对等位基因”,3分)两对等位基因位于非同源染色体上。(2分)(2)将其中一白花雌株分别与另外白花雄株杂交两次杂交的子代均没有出现开白花的植株该和白花雌株为双隐性纯合的白花雌株.(其他合理即可,4分)【解析】(1)已知植物花色由常染色体二的两对等位基因A、a和B、b共同控制,两白花植株杂交,当亲本仅有一对等位基因时,两对基因无论是否在一对同源染色体,F雌雄株中红花与白花的比例均是1:3。红花个体的基因型可表示为A-B-,F中红花植株相互授粉,F2雌雄株中红花与白花的比例均是9:7,出现此比例的最重要前提条件是两对等位基因位于非同源染色体上。(2)纯合白花植株的基因为AAbb、aBB、aabb,aabb分别与AAbb和aaBB杂交,后代均为白花植株,无红花植株出现,即可判断出双隐性纯合的白花植株(还有其他合理的答案)。

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