Q.1.
Mutations can be brought about by .... .. [ BHU 1992]
-
25%
a) Aniline dye
-
75%
b) X-rays
-
0%
c) Auxins
-
0%
d) D.D.T
Q.2.
Given in the figure is chromosomal mutation. It is ... ... [ AIIMS 2004 ]
-
0%
a) Duplication
-
33%
b) Inversion
-
33%
c) Deletion
-
33%
d) Reciprocal translocation
Q.3.
A mutation results in change in ... ... [ DPMT 1997]
-
100%
a) Sequence of amino acids in a protein
-
0%
b) tRNA sequence of nucleotides
-
0%
c) rRNA of ribosomes
-
0%
d) None of the above
Q.4.
Mutation caused by a mutagen is .... ... [ EAMCET 1995 ]
-
0%
a) Induced
-
0%
b) Natural
-
75%
c) Spontaneous
-
25%
d) Chemical mutation
Q.5.
A cross between white eyed female and red eyed male Drosophila gives red eyed females and white eyed males. Rarely the cross gives rise to white eyed females and red eyed males. this is due to .. .... [ BHU 1994]
-
50%
a) Loss of sex chromosome
-
50%
b) Mutation in female fly
-
0%
c) Nondisjunction of two X-chromosomes in female
-
0%
d) Mutation in male
Q.6.
Polyploid formed by two different species is called .... .. [ WB 2011 ]
-
67%
a) Autopolyploid
-
0%
b) Allopolyploid
-
0%
c) Triploid
-
33%
d) Monoploid
Q.7.
the gene for cystic fibrosis is located over chromosome .... .. [ HPPMT 2007 ]
-
75%
a) 4
-
25%
b) 7
-
0%
c) 11
-
0%
d) 12
Q.8.
A mother is afflicted by Down's syndrome caused by an extra copy of chromosomeFather is normal. Percentage of offspring affected by the disorder would be .... ... [ AIIMS 2007 ]
-
0%
a) 100%
-
50%
b) 75%
-
50%
c) 50%
-
0%
d) 25%
Q.9.
Mongolism, Patau's syndrome and Edward's syndrome are due to ... ... [ MPPMT 1998 ]
-
50%
a) Allosomal abnormalities
-
0%
b) Autosomal abnormalities
-
50%
c) Both A and B
-
0%
d) None of these
Q.10.
Chromosome complement of human male is ... ... [ JIPMER 2002]
-
0%
a) 44 + AO
-
0%
b) 44 A + XX
-
100%
c) 44 A + XY
-
0%
d) 44 A + XXY
Q.11.
haemophilia is caused by ... ... [ WB 2008 ]
-
0%
a) Dominant sex-linked gene
-
100%
b) Recessive sex-linked gene
-
0%
c) Recessive autosomal gene
-
0%
d) Dominant autosomal gene
Q.12.
Sudden change which breeds true is .... .. [ MPPMT 1996]
-
100%
a) mutation
-
0%
b) law of inheritance
-
0%
c) inheritance of acquired characters
-
0%
d) natural selection
Q.13.
Is it possible to say when a gene will mutate.. ... [ AMU 2000 ]
-
0%
a) Sometimes
-
0%
b) Always
-
100%
c) Never
-
0%
d) The gene does not mutate
Q.14.
Phenylketonuria, Huntington's disease and sickle cell anaemia are caused by disorders associated with chromosomes ... ... [ kerala 2006 ]
-
0%
a) 7, 11 and 12
-
25%
b) 12, 4 and 11
-
0%
c) 11,4 and 12
-
75%
d) 7, 12 and 11
Q.15.
Of both normal parents, the chances of male child becoming colour blind are ... .. [ CBSE 1993 ]
-
50%
a) No
-
50%
b) Possible only when all the four grand parents had normal vision
-
0%
c) Possible only when father's father was colour blind
-
0%
d) Possible only when mother's father was colour blind
Q.16.
Number of nucleosomes found in helical coil of 30 nm chromatin fiber is ... ... [ RPMT 2000 ]
-
50%
a) 6
-
0%
b) 10
-
50%
c) 12
-
0%
d) 15
Q.17.
A family of five daughter only is expecting sixth issue. The change of its beings a son is ... ... [ AFMC 2000 ]
-
0%
a) Zero
-
67%
b) 25%
-
33%
c) 50%
-
0%
d) 100%
Q.18.
A normal couple has seven children ( 2 daughter and 5 sons). Three of the sons suffer from a hereditary disorder but none of the daughters is affected. Which is the inheritance type? ... [ CBSE 2005 ]
-
0%
a) Sex-limited recessive
-
0%
b) Autosomal dominant
-
50%
c) Sex-linked dominant
-
50%
d) Sex-linked recessive
Q.19.
Total hereditary material outside the chromosome is called .... .. [ MPPMT 2011]
-
50%
a) Muton
-
0%
b) Recon
-
0%
c) Plasmon
-
50%
d) Plasmagene
Q.20.
Sex-linked traits are generally ... .. [ Wardha 2003 ]
-
0%
a) Lethal
-
100%
b) Recessive
-
0%
c) Dominant
-
0%
d) Pleiotropic
Q.21.
Chromosome complement 2n-1 is ... ... [ BHU 2005]
-
50%
a) Monosomy
-
0%
b) Nullisomy
-
50%
c) Trisomy
-
0%
d) Tetrasomy
Q.22.
Genetic balance theory holds good in case of .... ... [ KCET 2001 ]
-
50%
a) Humans
-
0%
b) Drosophila
-
50%
c) Grasshopper
-
0%
d) Allium cepa
Q.23.
In humans, sex is determined by .... .. [ MPPMT 1991 ]
-
50%
a) Y-chromosome
-
0%
b) X-chromosome
-
0%
c) A and X-chromosome
-
50%
d) A and Y-chromosome
Q.24.
Father of human genetics is ... ... [ har. PMT 2001 ]
-
0%
a) Cuvier
-
50%
b) Bateson
-
50%
c) Mendel
-
0%
d) Garrod
Q.25.
An unfertilized human ovum has ... ... [ MPPMT 1993 ]
-
0%
a) X and Y chromosomes
-
50%
b) X and X chromosomes
-
0%
c) X in some and Y in others
-
50%
d) Only one X-chromosome
Q.26.
Defect in amino acid metabolism may result in ... ... [ CPMT 2004 ]
-
0%
a) Porphyria
-
100%
b) Phenylketonuria
-
0%
c) Wilson's disease
-
0%
d) Tay Sachs disease
Q.27.
Mental retardation associated with sex chromosomal abnormality is due to ..... [AMU 2002 ]
-
100%
a) Reduction in X-complement
-
0%
b) Increase in X-complement
-
0%
c) Moderate increase in Y-complement
-
0%
d) Large increase in Y-complement
Q.28.
Distance between the genes a, b, c and d in map units is a-d = 3.5; b-c = 1; a-b=6; c-d=1.5 and a-c=Find out the sequence of the genes ... ... [ kerala 2008 ]
-
100%
a) a d c b
-
0%
b) a c d b
-
0%
c) a b c d
-
0%
d) a c b d
Q.29.
Association of parental combination of characters in offspring in excess of dihybrid cross is due to
-
50%
a)Pseudo alleles
-
50%
b) Linkage
-
0%
c) Polygeny
-
0%
d) Codominance
Q.30.
Plant A has 2n = 12 chromosomes while plant B has 2n = 16 chromosomes. An allotetraploid is raised from them. What is its chromosome number... .. [ Odisha 2010 ]
-
100%
a) 7
-
0%
b) 14
-
0%
c) 28
-
0%
d) 32
Q.31.
One of the genes present exclusively on the X-chromosome in humans is concerned with ... ... [AIIMS 2003 ]
-
0%
a) Baldness
-
100%
b) Red-green colour blindness
-
0%
c) Facial hair/ moustaches in male
-
0%
d) Night blindness
Q.32.
Process of genetic mutation is .... ... [ MPPMT 2002 ]
-
0%
a) reversible
-
0%
b) irreversible
-
0%
c) partially reversible
-
100%
d) continuous
Q.33.
The number of auto chromosomes in human sperms are ... .... [ MPPMT 2010 ]
-
50%
a) 22
-
50%
b) 11
-
0%
c) 44
-
0%
d) 45
Q.34.
An example of disease of molecular mutation is ... ... [ MPPMT 1994 ]
-
0%
a) Sickle cell anaemia
-
50%
b) erythroblastosis fetalis
-
0%
c) Haemophilia
-
50%
d) Anaemia
Q.35.
Number of linkage in a polynucleotide would be ... ... [ DPMT 1996 ]
-
0%
a) Same as number of nucleotides
-
50%
b) Twice the number of nucleotides
-
0%
c) One less than the number of nucleotides
-
50%
d) One
Q.36.
An auto some is ... .. [ RPMT 1998 ]
-
50%
a) Chromosome half
-
0%
b) Sex chromosome
-
50%
c) Chromosome other than sex
-
0%
d) None of the above
Q.37.
Transposons are .... ... [ BHU 2005 ]
-
0%
a) Hose keeping genes
-
50%
b) transporting genes
-
50%
c) Jumping genes
-
0%
d) Stationary genes
Q.38.
A woman with two genes, one for haemophilia and one for colour blindness on one of its X-chromosomes, marries a normal man. The progeny will be .... ... [ CBSE 1998 ]
-
0%
a) All sons haemophilic and colour blind
-
50%
b) 50% haemophilic and colour blind sons and 50% normal sons
-
0%
c) All daughter haemophilic and colour blind
-
50%
d) 50% haemophilic daughter and 50% colour blind daughter
Q.39.
A man-made allopolyploid is .... .... [ Pb PMT 1997 ]
-
50%
a) Water melon
-
50%
b) Gossypium
-
0%
c) Triticale
-
0%
d) Triticum
Q.40.
R-II strain of T4 bacteriophage cannot lyse Escherichia coil. two of its types, R-II x and R-IIy were allowed to invade the bacterium which lysed because of .... ... [ CBSE 2001 ]
-
50%
a) transformation into wild types
-
0%
b) presence of similar cistrons
-
50%
c) presence of different cistrons
-
0%
d) absence of mutation
Q.41.
A man can inherit his X-chromosome from his .... .... [ kerala 2008 ]
-
0%
a) Paternal grandfather
-
50%
b) Paternal grandmother
-
0%
c) Maternal grandmother only
-
50%
d) Maternal grandfather or grand mother
Q.42.
Two genes situated very close on the chromosome show .... ... [ AFMC 1994 ]
-
33%
a) High crossing over
-
33%
b) Hardly any crossing over is detected
-
33%
c) No crossing over
-
0%
d) Only double cross-over can occur
Q.43.
An example of sex influenced inheritance is .... [EAMCET 2002 ]
-
50%
a) Haemophilia
-
0%
b) Baldness
-
0%
c) Colour blindness
-
50%
d) Down's syndrome
Q.44.
Philadelphia chromosome occurs in patients suffering from ... ... [ kerala 2004 ]
-
0%
a) Leukemia
-
0%
b) Rickets
-
100%
c) Hepatitis
-
0%
d) Albinism
Q.45.
Transposons are found in ... ... [ BHU 2001 ]
-
0%
a) Eukaryotes
-
0%
b) Prokaryotes
-
100%
c) Both A and B
-
0%
d) Angiosperms only
Q.46.
In order to remain linked, the distance between two genes should not increase beyond ... ... [ DPMT 1997 ]
-
100%
a) 10 map units
-
0%
b) 20 map units
-
0%
c) 40 map units
-
0%
d) 50 map units
Q.47.
A man suffering from recessive X-linked disease marries a normal woman. In the progeny ... ... [ CPMT 2009]
-
100%
a) All sons are normal
-
0%
b) All daughter are diseased
-
0%
c) All sons are diseased
-
0%
d) None of the above
Q.48.
Number of X-chromosomes in Turner's syndrome is .... ... [ MPPMT 1994 ]
-
0%
a) 3
-
0%
b) 2
-
100%
c) 1
-
0%
d) Zero
Q.49.
Which is correctly matched? .... .. [ CBSE 2002 ]
-
0%
a) Parsinson's disease -- X and Y-chromosomes
-
0%
b) Haemophilia -- Y-chromosme
-
100%
c) Down's syndrome -- 21st chromosme
-
0%
d) Sickle cell anaemia -- X-chromosome
Q.50.
Pick out the correct statements ... .. [ kerala 2009 ] a) Haemophilia is a sex-linked recessive character b) Down's syndrome is due to aneuploidy c) Phenylketonuria is an autosomal dominant gene disorder d) Phenylketonuria is an autosomal recessive gene disorder e) Sickle cell anaemia is an X-linked recessive gene disorder
-
100%
a) a, b, d correct
-
0%
b) a, c, e correct
-
0%
c) a, c correct
-
0%
d) b, e correct