如右图所示为四个遗传系谱图，下列有关叙述中正确的是(　　)_刷题宝

题干

如右图所示为四个遗传系谱图，下列有关叙述中正确的是(　　)

A：家系乙中患病男孩的父亲一定是该致病基因的携带者

B：甲、乙、丙、丁都可能是白化病的系谱图

C：甲、乙、丙、丁都不可能是红绿色盲遗传的系谱图

D：家系丁中这对夫妇再生一个正常男孩的几率是1/8

上一题下一题 0.0难度选择题更新时间:2020-03-12 01:11:23

答案(点此获取答案解析）

D

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中国人民解放军____是我国历史最为悠久的兵种。

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下列各句中，没有语病的一句是（）

同类题3

It is ____ (更好) to give than to take.

同类题4

根据短文内容，选择最佳答案。

Beckham in a Football Movie

Do you like football? You must know David Beckham. But do you know that he will be in a movie? He will be David Beckham in the movie Goal.

Beckham said, "I want to teach kids how to play football when I finally hang up my boots." "I believe that Goal will send a positive message to kids around the world."

Beckham, 29, said, "I think that Goal will make football more popular in America and Asia. I am very happy because I can help do it," he said.

同类题5

如图，直线l∥OB，则∠1的度数是（）

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