当一对基因中，一个是显性基因，一个是隐性基因时，生物表现出_刷题宝

题干

当一对基因中，一个是显性基因，一个是隐性基因时，生物表现出（　　）

A：显性性状

B：中间性状

C：隐性性状

D：无规律

上一题下一题 0.0难度选择题更新时间:2019-12-19 05:31:55

答案(点此获取答案解析）

A

同类题1

“理会得熟时，道理便在上面。又如律历、刑法、天文、地理、军旅、职官之类，都要理会，虽未能研其精微，然也要识个规模大概，道理方泱洽通透。”这段话提倡的是：

同类题2

\vec{a}

=（1，1），

\vec{b}

=（﹣1，1），k

\vec{a}

\vec{b}

\vec{a}

\vec{b}

垂直，则k的值是（）

同类题3

如图，AB是圆O的直径，P是圆弧

\hat{A B}

上的点，M，N是直径AB上关于O对称的两点，且AB=4，MN=2，则

\vec{P M}

\vec{P N}

同类题4

补全对话

从方框中选择最佳选项完成对话, 有两项多余

a. I'm cleaning the house.

b. Is your mother making dumplings with her?

c. What about your father?

d. Yes, we are.

e. She is buying some food in the shop.

f. What's your mother doing?

g. They are making cards for their family and teachers.

Daming: Hi, Tony! Are you getting ready for Spring Festival?

Tony:____

Daming: What are the girls doing?

Tony:____

Daming:Sounds great(听起来很好)! Where is your mother?

Tony:____

Daming: What are you doing?

Tony:____

Daming: How hard you are working! And is your sister helping you?

Tony: No, she isn't. She is shopping with my mother.

Daming:____

Tony: Look! He's painting the door there.

同类题5

下列关于古代文化知识，不正确的一项是（）

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