皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【简答题】
用纯种高茎豌豆与纯种矮茎豌豆做亲本进行杂交,不论高茎做父本还是母本。杂交后产生的子一代茎。他又用子一代自交(自花传粉),得到的子二代有高茎也有矮茎。用同样的原理,又做了其他的杂交实验,其中的三种统计结果如下表: 性状 子一代的表现 子二代的表现 种子的形状 圆粒 圆粒 5474 皱粒 1850 茎的高度 高茎 矮茎 277 高茎 787 子叶的高度 黄色 黄色 6022 绿色 2001 表中有哪几对能称为相对性状?(5分) (2)哪些是显性性状,哪些是隐性性状?请写出判断的理由。(5分)
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】_______, she is quite modest.
A.
As she is an experienced teacher
B.
An experienced teacher as she is
C.
Experienced teacher as she is
D.
Experienced teacher although she is
【单选题】_________yesterday, did we receive your L/C. ( ) A. Until B. Not until C. Until not D. No until
A.
Until
B.
Not until
C.
Until not
D.
No until
【单选题】He is an tourist and he has interesting experiences.
A.
experienced; a great many of
B.
experienced; a great deal of
C.
experiential; a great deal of
D.
experienced; a great many
【单选题】I arrive at nine o'clock, teach until twelve thirty and then have a meal that is my morning ______ .
A.
habit
B.
custom
C.
practice
D.
routine
【简答题】按检测线的自动化程度分类,汽车检测站可分为手动式、_________和 _________ 三种类型。
【单选题】下列关于高能磷酸键的叙述,正确的是
A.
实际上并不存在键能特别高的高能键
B.
所有高能键都是高能磷酸键
C.
高能磷酸键只存在于ATP
D.
高能磷酸键仅在呼吸链中偶联产生
E.
有ATP参与的反应都是不可逆的
【单选题】Mary is______ than Alice.
A.
more experienced a teacher
B.
a more experienced teacher
C.
more an experienced teacher
D.
more experienced teacher
【单选题】Andrew is ______ than his students.
A.
more an experienced teacher
B.
a more experienced teacher
C.
an experienced more teacher
D.
a teacher more experienced
【单选题】____ that he went to sleep. [     ]
A.
It was until midnight
B.
That was until midnight
C.
It was not until midnight
D.
That was not until midnight
【简答题】高能键
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题