题干

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:与亲代AaBb 皮肤颜色深浅一样的占子代的3/8

C:肤色最浅的孩子基因型是aaBb

D:与亲代AaBB表现型相同的占子代的l/4

上一题 下一题 0.0难度 选择题 更新时间:2019-03-04 06:13:11

答案(点此获取答案解析)

D

同类题3

根据短文内容,从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Tips for a Happier Workplace

    You don't have to be friends with your co-workers, but you do need to be friendly. Read on for fresh ways to make your office a kinder, gentler place.

◆Give a happy “Hello! ”in the morning

    Do you walk into the office, eyes down, and immediately start work? If so, you are likely to find that co-workers ignore(忽视)you or avoid you.____It's really amazing how fast this small gesture can change unfriendly workplace relations.

◆Learn the art of small talk

    Ask your co-workers about their interests—their favorite music, movies, and books, as well as their hobbies ____ Once you know what catches their imagination, pick up stories from newspapers or magazines to help start conversations.

◆Ask what they think

    People love to be asked for their opinion, so go out of your way to ask, “What do you think of this report? ” or “How do you think I should deal with this situation? ”____

◆Avoid gossip(流言飞语)

    ____So return the favor. When a co-worker walks towards you bearing a piece of gossip, respond(回应)with, “Really? ”and then change the subject or get back to work. If you don't respond, the gossiper will move on.

____

    To win friends at work, start with good office etiquette(礼节). There's nothing more frustrating(令人沮丧的)to busy co-workers than to have their emails and phone messages ignored. Your silence doesn't just make their jobs harder; it also conveys(传达)an unpleasant message: You are unimportant to me.

A. Stop complaining.

B. Return calls and emails immediately.

C. Then give the advice giver a silent thank-you.

D. Always work as hard as anyone working for you.

E. You don't want anyone talking about you behind your back, right?

F. Showing an interest in them will make them feel comfortable around you.

G. Get into the habit of greeting your co-workers with a smile as you arrive in the morning.

同类题4

阅读下面的文字,完成文后小题。

    姚文然,字弱侯,江南桐城人。明崇祯十六年进士,改庶吉士。顺治三年,以安庆巡抚李犹龙荐,授国史院庶吉士。五年,改礼科给事中。六年,疏请“敕抚、按、道恩诏,清理刑狱,勿任有司稽玩。条赦之外,有可矜疑原宥者,许专疏上陈”。又请重定会试下第举人选用例,以广任使。又请敕各省督抚,勿滥委私人署州县官。诸疏皆下部议行。寻转工科。

    八年,世祖亲政,疏请令都察院甄别各省巡按,下部院会议,以六等考核,黜陟有差。是岁,江南、浙江被水,文然请灾地漕米改折,视灾重轻定折多寡。既,又言:“折漕例新定,民未周知。官吏或折外重徵耗银,或先已征米而又收折,或折重运轻,其弊不一。请敕漕臣密察严劾。”上并采纳。十年,疏言大臣得罪不当锁禁,得旨允行。迁兵科都给事中,乞归养。

    康熙五年,起补户科给事中。九年,考满内升,命以正四品顶带食俸任事。故事,给事中内升,还籍候补。留任自文然始。文然与魏象枢,皆以给事中敢言,负清望,号“姚魏”。十年,两江总督麻勒吉坐事逮,诣京师,仍用锁系例。文然复上疏论之,上谕:“自后命官赴质,概免锁系,著为令。”

    寻迁副都御史,再迁刑部侍郎。十二年,调兵部督捕侍郎。京口副都统张所养,劾将军柯永蓁徇私纵恣,令文然往按,永蓁坐罢。迁左都御史。十三年,疏言:“福建耿精忠、广西孙延龄皆叛应吴三桂,中间阻隔,赖有广东。精忠将士旧驻其地,熟习山川形势,倘与延龄合谋相犄角,则广东势危。江西境与福建、广东接,倘侵据赣州南安,驿道中断,饷阻邮梗,宜驻重兵通声援。”上嘉纳之。陕西提督王辅臣叛,河南巡抚佟凤彩引疾,上已许之。文然言河南近陕西流言方甚凤彩得民心宜令力疾视事上为留凤彩。

    文然屡有论列,尤推本君身,请节慎起居。孝诚皇后崩,权攒巩华城,上数临视,文然密疏谏,且引唐太宗作台望昭陵,用魏徵谏毁台事相拟,上亦受之,不怫也。十五年,授刑部尚书。时方更定条例,文然曰:“刃杀人一时,例杀人万世,可无慎乎?”乃推明律意,钩稽揅讨,必剂於宽平,决狱有所平反,归辄色喜。尝疑狱有枉,争之不得,退,长跪自责。又以明季用刑惨酷,奏除廷杖及镇抚司诸非刑。十七年,卒,赐祭葬,谥端恪。

(选自《清史稿》)