下列关于哺乳动物胚胎发育和胚胎工程的叙述，正确的是-最需题库

试卷相关题目

1如果在某种群中，基因型AA的比例占25%，基因型Aa的比例为50%，基因型aa比例占25%，已知基因型aa的个体失去求偶和繁殖的能力，则随机交配一代后，基因型aa的个体所占的比例为
A.1/16
B.1/9
C.1/8
D.1/4
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2下面是四位同学的实验操作方法或结果，其中正确的一项是
A.西瓜汁中含有丰富的葡萄糖和果糖，可用作还原糖鉴定的替代材料
B.提取叶绿体中的色素的方法是利用色素在滤纸条上扩散速度不同
C.稀释的蛋清溶液与双缩脲试剂作用产生紫色反应
D.显微镜下观察根尖的有丝分裂所用的材料必须始终处于生活状态
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3下列有关生物知识的叙述中，正确的说法有①基因重组只能产生新的基因型，而不能产生新的基因，基因突变才能产生新的基因②在性别比例为1:1的种群中，雄性个体产生的精子数多于雌性个体产生的卵细胞数③Y染色体上的基因控制的性状在雌性个体中不可能出现④随机交配的种群里，一对等位基因中显性基因与隐性基因的频率相等时，显性性状个体数量多⑤生长激素由腺垂体分泌，青壮年生长激素分泌过多会患巨人症
A.2个
B.3个
C.4个
D.5个
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45-溴尿嘧啶能代替胸腺嘧啶与腺嘌呤配对。现将含有两对同源染色体的精原细胞，放在含5-溴尿嘧啶的原料中进行减数分裂。则该细胞所产生的四个精子中，含5-溴尿嘧啶的精子占
A.25％
B.50％
C.75％
D.100％
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5人类的皮肤含有黑色素，皮肤中黑色素的多少由两对独立遗传的基因（A和a、B和b）所控制，显性基因A和B可以使黑色素量增加，两者增加的量相等，并且可以累加。一个基因型为AaBb的男性与一个基因型为AaBB的女性结婚，下列关于其子女皮肤颜色深浅的描述中错误的是（）
A.可产生四种表现型
B.肤色最浅的孩子基因型是aaBb
C.与亲代AaBb皮肤颜色深浅一样的有3/8
D.与亲代AaBB表现型相同的有1/4
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6下表是苋菜抗“莠去净”（一种除草剂）突变品系和敏感品系的部分DNA模板链碱基和氨基酸所在的位置。下列有关叙述中错误的是<table style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; MARGIN: auto auto auto 75.5pt; BORDER-COLLAPSE: collapse; BORDER-TOP: medium none; BORDER-RIGHT: medium none; mso-table-layout-alt: fixed; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 0cm 0cm 0cm 0cm; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext" border="1" cellspacing="0" cellpadding="0" _dj="MsoNormalTable"><tbody><tr style="HEIGHT: 15.3pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 68.2pt; PADDING-RIGHT: 0cm; HEIGHT: 15.3pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt" width="91">抗性品系</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 45.05pt; PADDING-RIGHT: 0cm; HEIGHT: 15.3pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" width="60">CGT丙氨酸</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 45.05pt; PADDING-RIGHT: 0cm; HEIGHT: 15.3pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" width="60">GGT脯氨酸</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 54.05pt; PADDING-RIGHT: 0cm; HEIGHT: 15.3pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" width="72">AAG苯丙氨酸</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 54.05pt; PADDING-RIGHT: 0cm; HEIGHT: 15.3pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" width="72">TTA天冬酰胺</td></tr><tr style="HEIGHT: 15.15pt; mso-yfti-irow: 1"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 68.2pt; PADDING-RIGHT: 0cm; HEIGHT: 15.15pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="91">敏感品系</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 45.05pt; PADDING-RIGHT: 0cm; HEIGHT: 15.15pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="60">CGA丙氨酸</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 45.05pt; PADDING-RIGHT: 0cm; HEIGHT: 15.15pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="60">AGT丝氨酸</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 54.05pt; PADDING-RIGHT: 0cm; HEIGHT: 15.15pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="72">AAG苯丙氨酸</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 54.05pt; PADDING-RIGHT: 0cm; HEIGHT: 15.15pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="72">TTA天冬酰胺</td></tr><tr style="HEIGHT: 10.55pt; mso-yfti-irow: 2; mso-yfti-lastrow: yes"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 68.2pt; PADDING-RIGHT: 0cm; HEIGHT: 10.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="91">氨基酸位置</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 45.05pt; PADDING-RIGHT: 0cm; HEIGHT: 10.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="60">227</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 45.05pt; PADDING-RIGHT: 0cm; HEIGHT: 10.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="60">228</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 54.05pt; PADDING-RIGHT: 0cm; HEIGHT: 10.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="72">229</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; WIDTH: 54.05pt; PADDING-RIGHT: 0cm; HEIGHT: 10.55pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="72">230</td></tr></tbody></table>
A.抗性品系有可能再突变为敏感品系
B.编码丙氨酸的密码子是CGU、CGA
C.抗性的产生是由于DNA上的遗传信息发生了改变
D.抗性基因与敏感基因之间有两个碱基对发生了替换
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