2022英语周报 八年级新目标44答案

27.D【解析】伴Ⅹ染色体隐性遗传具有隔代遗传和交叉遗传的特点,A项正确;一对表现型正常的夫妇女性可能是携带者,仍然可以生出患色育的孩子·13项正确;按照遗传平衡定律计算,女性群体中XXb的基因型频率为X的基因频率的平方,即20%X20%=4%但男、女比例为1:1,则XX的频率为4%X1/2=2%。由于男性只有一条X染色体,则男性群体中X的基因频率就是基因型頻率,为20%,但男、女比例为1:1,则XY的频率为20%l2-10%,C项正确;采取遗传咨询、基因诊断等措施可以降低色盲的发病率,但是如果不采取遗传咨询、基因诊断等措施,该群体中色盲的发病率不一定会越来越高,项错误。

Paragraph 1:Thinking of this, I told him,"Sir, you please have your tea, I am not in a hurry. " This gentleman, whohad worked in the bank for so many years, suddenly Iooked up at me and for the first time we had eye contact-he had never made eye contact earlier. I saw a different person there. He gave me a rare smile and saidIt is an everyday affair with me, you are not in a hurry but somebody else will come who will be in a hurry【表面上像机器人的同事也有自己的思绪】Paragraph 2What he said really touched my heart. I felt that all this time I thought of him as a robot, someone who wasthere for my convenience, but today I suddenly felt astrange bond with him.【高分句型-】| promised tobe more friendly with people who help me with my work and be thankful that they are there for me.【高分句型二】. our life, we need to put ourselves in otherpeople's shoes to imagine their thoughts. In this way, we can understand others better.【作者对同事的话有所咸悟】

以上就是2022英语周报 八年级新目标44答案，更多英语周报答案请关注本网站。