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1、高三遗传专题1人类的红绿色盲在人群中的发病特点是( ) A男性患者多于女性患者 B女性患者多于男性患者C只有男性患者 D只有女性患者2. 一对夫妇都正常,他们的父母也正常,妻子的弟弟是色盲,则他们生的男孩是色盲的概率( )A 1/2 B 1/3 C 1/4 D 1/8 3、357421630. 右图是一色盲家族的系谱图,7号的色盲基因来自( )A、1 B、2 C、3 D、44、下图是某家系红绿色盲病遗传的图解。色盲基因用b表示,图中除男孩3和他的外祖父4是红绿色盲外,其他人色觉都正常,据图回答:3的基因型是 ,2的可能基因型是 。中与男孩3的红绿色盲基因有关的亲属的标号是 ,其基因型是 。 1
2、是红绿色盲基因携带者的概率是 。如果她与一个其父是色盲的正常男人结婚,第一胎是色盲男孩的概率是 。5(09年6月)人脸颊上有酒窝是显性性状,无酒窝是隐性性状,控制这对相对性状 的等位基因位于常染色体上。一对无酒窝的夫妇生出有酒窝小孩的概率是( ) A0 B14 C12D346(10年1月)人的褐色眼(B)对蓝色眼(b)为显性,双眼皮(D)对单眼皮(d)为显性,这两对基因位于非同源染色体上。在一个家庭中,父亲为褐色双眼皮(BbDd),母亲为蓝色双眼皮(bbDd),生出的孩子是蓝色单眼皮的几率是( ) A12 B14 C18 D1167(09年6月,多选)图是某一伴性遗传病的系谱图,根据此图可推出
3、( )A该病是隐性遗传病 B该病是显性遗传病C-2携带致病基因 D-3是杂合体8(10年1月,多选)人类红绿色盲症是一种伴性遗传病。 右图为该病的系谱图,据图可知( )A此病基因是显性基因 B此病基因是隐性基因CI一1携带此病基因 D一5携带此病基因9. (10年6月,多选)某家系有一种由X染色体上显性基因导致的遗传病, 根据所学遗传学知识,推测该家系的遗传系谱图可能是( )10. (11年1月,多选)血友病为伴X隐性遗传病。下图为某家庭的遗传系谱图, II-3为血友病患者,II-4与II-5为异卵双胞胎。下列分析中,正确的是 A.I-1不是血友病基因携带者 B.I-2是血友病基因携带者 C.
4、II-4可能是血友病基因携带者 D.II-5可能是血友病基因携带者11.(11年6月,多选)下列遗传系谱图中,肯定为隐性遗传病的是12(12年1月,多选)图为某遗传病的遗传系谱图。由图可推测该病可能是( ) A常染色体显性遗传病 B常染色体隐性遗传病 CX染色体显性遗传病DX染色体隐性遗传病答案5A 6C 7BD 8BC 9BC 10 ABD 11AB 12 ABC1.在下列4个图中,只能是由常染色体上隐性基因决定的遗传病是( ) A. B. C. D. 2在某色盲男孩的父母、祖父母、外祖父母中,除祖父是色盲外,其他人色觉均正常,这个男孩的色盲基因来自( )A祖父 B祖母 C外祖父 D外祖母3
5、下图是某家系一种遗传病的遗传图解,成员中1、2和2为患者。推测合理的一项是() 1 2 1 2 3 4 1 2 3 AIII2为患病男孩的概率是50% B该病为常染色体显性遗传病CII3携带致病基因的概率是50% D该病为X染色体显性遗传病4某班同学对一种单基因遗传病进行调查,绘制并分析了其中一个家系的系谱图(如图1)。下列说法正确的是( )A该病为常染色体显性遗传病BII-5是该病致病基因的携带者C II-5和II-6再生患病男孩的概率为1/2DIII-9与正常女性结婚,建议生女孩5.下图是一个色盲系谱图, 用B、b表示,请据图回答: (1)色盲遗传属于 性遗传, 色盲基因位于 染色体上。
6、(2)1的基因型是 。5的基因型是 。8的基因型是 。 (3)8与9结婚所生的孩子是色盲患者的几率是 。是正常女孩的几率是 6、抗维生素D佝偻病是由位于X染色体的显性致病基因决定的一种遗传病,这种疾病的遗传特点之一是( )A.男患者与女患者结婚,其女儿正常 B.男患者与正常女子结婚,其子女均正常C.女患者与正常男子结婚,必然儿子正常女儿患病D.患者的正常子女不携带该患者传递的致病基因 7.右图是具有两种遗传病的某家族系谱图,设甲病显性基因为A,隐性基因为a,乙病显性基因为B,隐性基因为b。若-2无乙病基因。下列说法正确的是甲、乙两病男甲病男女正常男女345612A甲病为常染色体隐性遗传病B I
7、I-3号是纯合体的概率是1/6C乙病为X染色体隐性遗传病第7题图D设-4与一位正常男性结婚,生下正常男孩的概率为3/4。 8下图所示的是一种罕见的疾病苯丙酮尿症(PKU)的家系图,设该病受一对等位基因控制,A是显性,a是隐性),下列叙述不正确的是()A8的基因型为Aa BPKU为常染色体上的隐性遗传病C8与9结婚,生了两个正常孩子,第3个孩子是PKU的概率为1/6D该地区PKU发病率为1/10000,10号男子与当地一正常女子结婚,生病孩几率为1/2001(2012滨州模拟)犬也存在色盲性状。如图为某一品种犬的系谱图(涂黑表示色盲)。请据图判断此品种犬色盲的遗传方式不可能是 ()。A常染色体显
8、性遗传 B常染色体隐性遗传C伴X染色体显性遗传 D伴X染色体隐性遗传2(2012潍坊模拟)一个家庭中,父亲是色觉正常的多指(由常染色体显性基因控制)患者,母亲的表现型正常,他们却生了一个手指正常但患红绿色盲的孩子。下列叙述正确的是 ()。A该孩子的色盲基因来自祖母B这对夫妇再生一个男孩,只患红绿色盲的概率是C这对夫妇再生一个正常女儿的概率是D父亲的精子不携带致病基因的概率是答案1C2C由父亲为多指(A_)色觉正常(XBY),母亲表现型正常(aaXBX),生有一手指正常但患红绿色盲(aaXbY)的孩子,可推知该夫妇的基因型为:夫AaXBY、妇aaXBXb,该孩子的色盲基因来自母亲,与祖母无关;该
9、夫妇再生一个男孩,只患红绿色盲的概率为,这对夫妇再生一个正常女儿的概率为; 3(双选)(2012广东,25)人类红绿色盲的基因位于X染色体上,秃顶的基因位于常染色体上,结合下表信息可预测,下图中3和4所生子女是()。BBBbbb男非秃顶秃顶秃顶女非秃顶非秃顶秃顶A非秃顶色盲儿子的概率为B非秃顶色盲女儿的概率为C秃顶色盲儿子的概率为 D秃顶色盲女儿的概率为0答案:CD4如图为四个遗传系谱图,下列有关叙述正确的是 ()。A甲和乙的遗传方式完全一样B丁中这对夫妇若再生一个女儿是正常的几率为C乙中若父亲携带致病基因则该遗传病由常染色体隐性基因控制D丙中的父亲不可能携带致病基因.答案C5(2012广州二
10、模,2)(双选)下图是单基因遗传病的家系图,下列判断正确的是()。A甲病是常染色体显性遗传病B个体4肯定不含致病基因C1、2再生一个两病皆患孩子的概率是D1、3基因型相同的概率是答案AD6(2012广东茂名一模,3)如图为某一遗传病的家系图,其中2家族中无此致病基因,6父母正常,但有一个患病的弟弟。此家族中的1与2患病的可能性分别为 ()。A0、 B.、 C.、 D0、答案A正常双亲生出患病女儿,故该遗传病是常染色体隐性遗传病,1的基因型是aa,2的基因型是AA;5的基因型是Aa或AA,6的基因型是Aa或AA。因此,此家族中的1的患病率为0,2患病率为。7(2012江苏联考)某家系中有甲、乙两
11、种单基因遗传病(如图),其中一种是伴性 遗传病。相关分析不正确的是 ()。A甲病是常染色体显性遗传病、乙病是伴X染色体隐性遗传病B3的致病基因均来自2C2有一种基因型,8基因型有四种可能D若4与5结婚,生育一个患两种病孩子的概率是答案B由题图分析可知,甲病的遗传方式为常染色体显性遗传,则乙病的遗传方式为伴X染色体隐性遗传。控制甲、乙两种病的基因分别用A、a和B、b表示,则3的基因型为AaXbY,其致病基因来自1和2;2的基因型为aaXBXb,8的基因型可能有AAXBXB、AAXBXb、AaXBXB、AaXBXb四种;4的基因型为AaXBXb,5的基因型为AAXbY、AaXbY,若4与5结婚,生
12、育一个患两种病孩子的概率。8(2012江苏,30)人类遗传病调查中发现两个家系都有甲遗传病(基因为H、h)和乙遗传病(基因为T、t)患者,系谱图如下。以往研究表明在正常人群中Hh基因型频率为104。请回答下列问题(所有概率用分数表示)。(1)甲病的遗传方式为_,乙病最可能的遗传方式为_。(2)若3无乙病致病基因,请继续以下分析。2的基因型为_;5的基因型为_。如果5与6结婚,则所生男孩同时患两种遗传病的概率为_。如果7与8再生育一个女儿,则女儿患甲病的概率为_。如果5与h基因携带者结婚并生育一个表现型正常的儿子,则儿子携带h基因的概率为_。答案:(1)常染色体隐性遗传伴X隐性遗传(2)HhXT
13、XtHHXTY或HhXTY9(2011海南高考)如图为某家族甲、乙两种遗传病的系谱图。甲遗传病由一对等位基因(A、a)控制,乙遗传病由另外一对等位基因(B、b)控制,这两对等位基因独立遗传。已知4携带甲遗传病的致病基因,但不携带乙遗传病的致病基因。回答下列问题。(1)甲遗传病的致病基因位于_(X、Y、常)染色体上,乙遗传病的致病基因位于_(X、Y、常)染色体上。(2)2的基因型为_,3的基因型为_。(3)若3和4再生一个孩子,则这个孩子为同时患甲、乙两种遗传病男孩的概率是_。(4)若1与一个正常男性结婚,则他们生一个患乙遗传病男孩的概率是_。(5)1的这两对等位基因均为杂合子的概率是_。答案(
14、1)常X(2)AaXBXbAAXBXb或AaXBXb(3)(4)(5)Winger Tuivasa-Sheck, who scored two tries in the Kiwis 20-18 semi-final win over England, has been passed fit after a lower-leg injury, while Slater has been named at full-back but is still recovering from a knee injury aggravated against USA.Both sides boast 100%
15、 records heading into the encounter but Australia have not conceded a try since Josh Charnleys effort in their first pool match against England on the opening day.Aussie winger Jarryd Hayne is the competitions top try scorer with nine, closely followed by Tuivasa-Sheck with eight.But it is recently
16、named Rugby League International Federation player of the year Sonny Bill Williams who has attracted the most interest in the tournament so far.The Kiwi - with a tournament high 17 offloads - has the chance of becoming the first player to win the World Cup in both rugby league and rugby union after
17、triumphing with the All Blacks in 2011.Id give every award back in a heartbeat just to get across the line this weekend, said Williams.The (lack of) air up there Watch mCayman Islands-based Webb, the head of Fifas anti-racism taskforce, is in London for the Football Associations 150th anniversary ce
18、lebrations and will attend Citys Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport.For me its about how he felt and I would like to speak to him first to find out what his experience was.Uefa hasopened disciplinary
19、 proceedings against CSKAfor the racist behaviour of their fans duringCitys 2-1 win.Michel Platini, president of European footballs governing body, has also ordered an immediate investigation into the referees actions.CSKA said they were surprised and disappointed by Toures complaint. In a statement
20、 the Russian side added: We found no racist insults from fans of CSKA. Baumgartner the disappointing news: Mission aborted.The supersonic descent could happen as early as Sunda.The weather plays an important role in this mission. Starting at the ground, conditions have to be very calm - winds less t
21、han 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. It will climb higher than the tip of Mount Everest (5.5 miles/8.85 kilometers), drifting
22、 even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.The balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume,
23、he will slowly step out onto something resembling an Olympic diving platform.They blew it in 2008 when they got caught cold in the final and they will not make the same mistake against the Kiwis in Manchester.Five years ago they cruised through to the final and so far history has repeated itself her
24、e - the last try they conceded was scored by Englands Josh Charnley in the opening game of the tournament.That could be classed as a weakness, a team under-cooked - but I have been impressed by the Kangaroos focus in their games since then.They have been concentrating on the sort of stuff that wins
25、you tough, even contests - strong defence, especially on their own goal-line, completing sets and a good kick-chase. Theyve been great at all the unglamorous stuff that often goes unnoticed in the stands but not by your team-mates.It is as though their entire tournament has been preparation for the
26、final.In Johnathan Thurston, Cooper Cronk, Cameron Smith and either Billy Slater or Greg Inglis at full-back they have a spine that is unmatched in rugby league. They have played in so many high-pressure games - a priceless asset going into Saturday.The Kiwis are a lot less experienced but winning a dramatic match like their semi-final against England will do wonders for their confidence.They defeated Australia in the Four Nations final in 2010 and the last World Cup, and know they can rise to the big occasion.