1.综合题- (共1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)
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)
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)
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【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)
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【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