甲乙两地相距80km

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/29 20:13:32
一个同源染色体上有几个等位基因? 两对等位基因位于两对同源染色体上或两对基因分别位于非源染色体上,生物中常常出现滴 为什么题目要这样说明 生物:如何判断两对等位基因是否位于同源染色体上 DJ是哪两个单词的缩写吗?它的准确定义是什么? I went to a party"last Saturday".(对引号部分提问) 1.Jim visitesd his grandparents last weekend.对 last weekend 提问 _ _Jim _ his grandparents?1.Jim visitesd his grandparents last weekend.对 last weekend 提问_ _Jim _ his grandparents?2.This is my uncle's present.对my uncle's 例:儿童是花朵,在春天的感召下会欢畅活泼地舒展出新鲜美丽的四肢. 再写两个句子,有好评例:儿童是花朵,在春天的感召下会欢畅活泼地舒展出新鲜美丽的四肢.再写两个句子,有好评 last summer I spend a week at my grandparents'house.since my grandparents do全文 等位基因位于同源染色体的非姐妹染色单体上吗 我知道我配不上你,英语怎么说 我恨我配不上你 用英语怎么说 同源染色体和等位基因有什么联系 等位基因与同源染色体有什么关系?非同源染色体是什么? 改同义句:They had fun last Sunday.在此空白处填词:They ____ ____ ____ ____ last Sunday. They had fun in the countryside last Sunday.(改为同义句) they held ( ) party last Sunday.( ) party was ( ) lots of funA a,the ,a B the ,the ,a C a,the,/ D a,the ,the 例:儿童是,在春天的感召下会欢畅活泼地舒展出新鲜美丽的四肢.填空:儿童是( ),( ) 两对性对形状的基因自由组合,如果F2的性状分离比分别为9:7、9:6:1和15:1,那么F1与双隐性个体测交得到的性状分离比是()A.1:3,1:2:1和3:1B.3:1,4:1和1:3C.1:2:1,4:1和3:1D.3:1,3:1和1:4 基因自由组合的实质是,F1产生配子时,等位基因分离,非等位基因自由组合.这句话怎么错了?为什么错了? 两对基因自由组合,如果F2的分离比分别为9:7、9:6:1、15:1,那么F1与双隐性个体测交,得到的分离比分别是 ( ). 基因的自由组合定律的实质是:在F1产生配子时,等位基因分离,非等位基因自由组合,为什么错? 两对相对性状的基因自由组合,如果F2的分离比分别是9:7,9:6:1,15:1和12:4,那F1与纯隐性个体测交,得到的分离比分别为?为什么? They had an English party last Sunday.(改否定句) they all enjoyed themselvesat the party last Sunday同义句 初二英语第2题 英语翻译I want am not you want to give can give 这句话有语法错误吗?不要用软件翻译哦 They went swimming twice a month last year.(保持句意不变)They _____ ______ go swimming twice a month last year. They have produced ____they did last year.A twice as much grain as B twice more grain asC twice as many grain asD as twice much grain as Last year they had a 什么 trip. 初二英语第二题 翻译这个英语短文 描写玫瑰形象的句子求大神帮助描写苦水玫瑰形象的句子