[试题] 97-2 丁诗同 遗传学 第一次期中模拟考

楼主: nacireman (飞天大乌龟)   2020-06-27 18:34:18
课程名称︰遗传学
课程性质︰大一必修
课程教师︰丁诗同
开课学院:生农学院
开课系所︰动科系
考试日期(年月日)97年︰
考试时限(分钟):10:20-12:10
试题 :
一、解释名词
1.Mendelian Segregation
2.X-Chromosome Inactivation
3.Recessive Epistasis
二、选择题
1.一对基因为杂合子的夫妻,皆带有一个多指的显性交替基因,他们生了三个
孩子,三个孩子拥有一样手指数目的机率为?
a.3/4 b.11/32 c.13/64 d.9/16 e.28/64
2.假设鼻毛颜色由SKII基因调控,野生型SKII基因会生成三十个酵素单位,而需要
六十个酵素单位以上(不含六十)才能长出黑色鼻毛的性状。有一突变基因只会制造
二十五个单位的酵素,请问这个突变的交替基因有什么特性?
a.对野生型显性 b.对野生型为隐性 c.对野生型为共显性 d.对野生行为不完全显性
e.对野生形有上位作用
3.如果杂合子的正常翅灰身果蝇(正常翅灰身果蝇为显性野生型)配上单杂合子的灰身
卷翅果蝇,请问其子代中出现正常翅灰身果蝇的机率?
a.1/8 b.2/8 c.3/8 d.1/2 e.9/16
4.承上题请问其子代卷翅灰身比例
a.1/16 b.1/8 c.2/8 d.1/2 e.3/8
5.A couple are both heterogenous for two autosomal recessive diseases: cystic
fibrosis and PKU. What is the probability that their first child will have
neither cystic fibrosis and PKU?
a.0 b.1/4 c.1/2 d.7/16 e.9/16
6.Mendel crossed Y/Y ; R/R(yellow wrinkled) peas with y/y ; r/r(green smooth)
peas and selfed the F1 to obtain the F2. In the F2 what proportion of the
yellow wrinkled individuals were not pure-breeding?
a. 1/16 b.3/16 c.8/9 d.1/9 e.1/4
7.In a cross between a female A/a;B/b;c/c;D/d;e/e and male A/a;b/b;C/c;D/d;e/e
what proportion of the progeny will be phenotypically different to the female
parent?(Assuming independent assortment of all genes and complete dominance)
a.55/64 b.45/64 c.31/64 d.17/64 e.3/16
8.对于某种狗,对偶基因B与b个别决定黑色和棕色的皮毛。然而,另一基因位于分隔的染色体上,
他的对偶基因Q对B和b为显性上位。此外会导致产生灰色的皮毛(q对颜色没有影响)。如果
含有基因型B/b;Q/q的两只狗交配,可预期后代表现型的比例上:
a.9灰3棕4黑 b.2灰1棕1黑 c.1灰7棕9黑 d.4灰7棕9黑 e.12灰1棕3黑
9.细胞分裂时,将染色体排列在赤道板上的时期为?此题复选题
a.有丝分裂 b.减数分裂1 c.减数分裂2 d.减数分裂3 e.减数分裂4
10.在禽类中,雌性为异配性别Z/W,而雄性为同配性别Z/Z。对一个养鸡者来说,在小鸡出生时
能分辨性别是相当重要的,但要分别很困难。然而,一个与Z联结的显性对偶基因B(有
条纹的性状)能用来帮助分别小鸡的性别,因为条纹与细线比很容易分辨。请问哪种组合将
产生所有条纹鸡同一性别,而无条纹鸡为另一行别:
a.条纹公鸡与无条纹母鸡 b.条纹公鸡与条文母鸡 c.无条文公鸡与无条纹母鸡
d.无条文公鸡与条文母鸡 e.以上皆非
11.下列何者正确(复选)
a.人为万物之灵基因体大小难波万
b.猪粒腺体DNA排列比植物有效率
c.人的DNA大部分为tDNA序列
d.植物粒线体DNA大于所有动物DNA
e.粒线体功能可只靠本身的基因产物
12.多指症之遗传特征为显性出现多指,有一对夫妻都有正常手指数目,已知父亲为隐性
纯合子,问以下描述何者正确?
a.子女不可能出现多指症 b.子女可能因超显性(overdominance)出现多指症
c.部分子女可能出现多指症,原因为基因突变 d.部分子女可能出现多指症,因为妈妈带有显性基因而未出现症状
e.以上皆非
13.In a shorthorn cattle, coat color is controlled by a single gene that can
exist as a red alled(R) or white(r). The heterozygous(Rr) have a color called
roan that look less red than RR. However, when examined carefully, the roan
phenotype in a cattle is actually due to a mixture of complete red hairs and
complete white hairs. What's the trait called?
a.Incomplete Dominant b.Codominant c.Dominant d.Recessive e.None of the Above
14.Huntington Disease is a rare dominant trait that causes neurodegeneration later
in life. A man in his 30s, who already fas three kids, discovered that his mother
has Huntington Disease(father is normal). What's the probability of his first child
develops Huntington disease?
a.0 b.1/8 c.1/4 d.3/4 e.all
15.The F,G and H loci are linked in the order written. There are 20 maps units
between G and H. If a plant FGH/fgh is testcorssed, what proportion of progeny
plants will be fgh/fgh if there is no interference?
a.15% b.30% c.32% d.36% e.70%
16.一个长度有5个碱基对的DNA分子,会有多少种DNA序列的可能?
a.20 b.32 c.64 d.256 e.1024
17.在台北捷运的隧道中发现一种病度,经专家认定此病毒为双股DNA病毒,请问这一种病毒
碱基配对最可能为何:
a.22%A,0%T,28%U,22%G,28%C
b.20%A,20%T,20%U,20%G,20%C
c.20%A,25%T,0%U,25%G,25%C
d.22%A,0%T,22%U,28%G,28%C
e.20%A,20%T,0%U,30%G,30%C
18.有一个体经染色体分析发现具有XXY染色体组成,请问下列叙述何者正确(可复选)
a.此人为雌雄同体 b.此人有雄性特征 c.此人有一个Barr Body d.此人有两
个Barr Body e.此人Barr Body出现在细胞膜附近
19. Which of the following is the correct order of increasing levels of chromosome
packing?(smallest to largest)
a.Nucleosomes-Loops-Solenoid-Supercoils
b.Solenoid-Nucleosomes-Loops-Supercoils
c.Solenoid-Nucleosomes-Supercoils-Loops
d.Solenoid-Loops-Nucleosomes-Supercoils
e.Nucleosomes-Solenoid-Loops-Supercoils
20.两个基因型的子代交配后,结果为9:3:3:1的外表型比例。此结果是下列何者造成的?
a.上位基因遗传 b.联会 c.独立分配 d.基因多样性 e.多倍体
21.有关X染色体的下列叙述何者错误?
a.不会影响男性个体 b.不会由男性传给男性子代 c.如果父亲是患者,母亲是携带者,
则女儿可能患病 d.他影响两性的任一性别,但女儿更容易患病 e.患病的男性通常
来自表现型正常的父母
22.鸡群中有“爬行鸡”的遗传性状(具短而弯曲的腿)。若在交配后,产生775只爬行鸡
和388只正常鸡的子代。其外表比例最接近何者?
a.3:1 b.2:1 c.1:1 d.3:2 e.4:1
23.承上题,下列何者可能是“爬行鸡”的遗传模式?
a.性联遗传 b.体染色体的致命遗传 c.上位基因对正常基因的遗传 d.ab皆对
e.染色体隐性遗传
24.若基因A与B间连锁于同一染色体上,且互换距离为10互换单位,则基因型为Ab/aB和
Ab/aB的个体交配后,子代基因型为隐性纯合子的机率为何?
a.10% b.5% c.1% d.0.5% e.0.25%
三、问答
1.A 请简单描述mitosis 和meiosis的功能
B 并请列出下列事件发生的时期
a.Seperation of conjointed chromatids within a pair of sister chromatids
b.Pairing of homologous chromosomes
c.Alignment of chromatids along the metaphase plate
2.Bateson和Punnet再做豌豆实验时发现紫花对红花显性且长痘对短豆显性。他们将
紫花长豆与红花圆豆交配后的F1自交,发现如下结果:4080个紫花长豆;360个紫花圆豆;
360个红花长豆与1200个红花圆豆。请问控制两性状的基因做是否位于同一染色体上?如果是距离
多远?▓

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