2015-2016学年江西省奉新县第二中学八年级下学期期中考试生物试卷(带解析)

适用年级:初二
试卷号:354520

试卷类型:期中
试卷考试时间:2016/5/30

1.综合题(共1题)

1.
我们常以杂交育种的方式培育水稻新品种,请根据表中数据回答有关问题:

(1)根据第③组的数据,在水稻的高茎与矮茎这一对相对性状中, 是显性性状。
(2)在第③组杂交的遗传图解中(用H、h分别表示显性基因、隐性基因):亲代基因组成:Hh×Hh,则子代中表现为高茎的基因组成可能为   
(3)请写出在第②组杂交中,亲代杂交组合:矮茎×矮茎,用基因组成表示为     。
(4)控制生物性状的基本单位是  

2.单选题(共2题)

2.
春暖花开,公园里的蜜蜂又忙着采蜜了。你知道蜜蜂的一生中,所经历的阶段是
A.卵→蛹→成虫B.卵→蛹→幼虫→成虫
C.卵→若虫→成虫D.卵→幼虫→蛹→成虫
3.
每种生物都具有恒定的染色体,人类体细胞中具有23对染色体。人的精子、造血干细胞、卵细胞、肌细胞中染色体数目依次为
A.23条、46条、46条、23条B.46条、92条、46条、92条
C.23条、23条、23条46条D.23条、46条、23条、46条

3.选择题(共1题)

4.

    A woman repeated a bit of gossip (流言) about a neighbour. Within a few days the whole neighbourhood knew the story. The neighbour was deeply hurt. Later the woman responsible (负责) for spreading the gossip learned that it was completely untrue. She was very sorry and went to a wise old man to find out what she could do to repair the harm.
   “Go to the marketplace,” he said. “and buy a chicken, and have it killed, then on your way home, pluck (拔) its feathers and drop them one by one along the road. ” Although surprised by this advice, the woman did what she was told.
   The next day the wise man said, “ Now, go and collect all those feathers you dropped yesterday and bring them back to me. ”
The woman followed the same road, but she was so discouraged when she found the wind had blown all the feathers away. After searching for hours, she returned with only three in her hand.
   “ You see, ” said the old man, “it's easy to drop them, but it's impossible to get them back . So it is with gossip. It doesn't take much to spread a gossip, but once you do, you can never completely undo the wrong.”

4.填空题(共1题)

5.
科学家将男、女体细胞内的染色体进行分析整理,形成了下面的排序图。请根据图示回答下列问题:

(1)在人的体细胞内染色体是 存在的。
(2)根据染色体组成可以判断,甲为  性的染色体组成。
(3)若该排序图表示的是已结生育七个女儿父母的染色体组成,假如他们再生一胎,是男孩的可能性为  
(4)甲、乙的眼睑性状均表现为双眼皮,却生了一个单眼皮的孩子。若他们再生一个孩子,表现为单眼皮的可能性是   。
(5)某一家庭的母亲,通过手术变成双眼皮,她的双眼皮性状不能遗传给后代,其原因是她体内的遗传物质 改变。(填有或者没有)
试卷分析
  • 【1】题量占比

    综合题:(1道)

    单选题:(2道)

    选择题:(1道)

    填空题:(1道)

  • 【2】:难度分析

    1星难题:0

    2星难题:0

    3星难题:0

    4星难题:0

    5星难题:0

    6星难题:4

    7星难题:0

    8星难题:0

    9星难题:0