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Biotechnology - 20
The percentage of individual with a given genotype, which exhibits the associated phenotype, is defined as A. penetrance B. expressivity C. inheritance percent D. environmental influence Diethyl stilbestrol (DES), a synthetic estrogen causes A. chromosome lagging B. disruption of mitotic spindle C. centriole elongation D. all of the above.... Bar eye character of Drosophila is due to A. duplication in region of 16A of X chromosome B. deletion in region of 16A of X chromosome C. due to presence of additional X-chromosome D. due to a point mutation in eye-locus....
Thời gian bắt đầu: Hôm nay lúc 14:52:01(Server time)
Số câu hỏi: 10.   Tổng điểm: 10
Thời gian làm bài: 20 phút.  Thời gian còn lại: 
Cỡ chữ câu hỏi:  Cỡ chữ đáp án:
1-
The percentage of individual with a given genotype, which exhibits the associated phenotype, is defined as
A-
penetrance
B-
expressivity
C-
inheritance percent
D-
environmental influence
2-
Diethyl stilbestrol (DES), a synthetic estrogen causes
A-
chromosome lagging
B-
disruption of mitotic spindle
C-
centriole elongation
D-
All of the above
3-
Bar eye character of Drosophila is due to
A-
duplication in region of 16A of X chromosome
B-
deletion in region of 16A of X chromosome
C-
due to presence of additional X-chromosome
D-
due to a point mutation in eye-locus
4-
Transmission of a gene from male parent to female child to male grand child is known as
A-
holandric inheritance
B-
quantitative inheritance
C-
criss-cross inheritance
D-
maternal inheritance
5-
The degree or extent to which a given genotype is expressed phenotypically in a particular individual is defined as
A-
penetrance
B-
expressivity
C-
inheritance strength
D-
environmental influence
6-
How many chromosomes are there in Caernorhabditis elegans?
A-
3
B-
6
C-
9
D-
12
7-
If two genes show 50% recombination
A-
they are on different chromosomes
B-
they are on same chromosome but far apart
C-
Both (a) and (b)
D-
they are closely located on the same chromosome
8-
Which of the following denotes a pair of contrasting characters?
A-
Alleles
B-
Phenotype
C-
Homozygous
D-
Genotype
9-
A map of chromosomes that utilizes cloned and sequenced DNA fragments rather than genetic markers is known as
A-
a physical map
B-
a genetic map
C-
a cloning map
D-
None of these
10-
In a dihybrid cross, the progeny of an Fl individual (hetero2ygous for both characters) will show a phenotypic ratio of
A-
1:1:1:1
B-
1:2:2:1
C-
9:3:3:1
D-
3:1:1:3
[ Thành Lãm - ST ]

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