Q.1
Which of the following is the most suitable medium for culture of Drosophila melanogaster?
  • a) Cow dung
  • b) Moist bread
  • c) Agar agar
  • d) Ripe Banana
Q.2
haemophilia is a genetic disorder in which .... ... [ AFMC 1998 ]
  • a) Blood clots in blood vessels
  • b) there is delayed coagulation of blood
  • c) blood fails to coagulate
  • d) blood cell count falls
Q.3
Hereditary disease in which urine turns black on exposure due to presence of homogentisic acid is .... ... [ BHU 2012 ]
  • a) Ketonuria
  • b) Phenylketonuria
  • c) Haematuria
  • d) Alkaptonuria
Q.4
Which chromosome set is found in male Grasshopper? [ Bih PMT 1995 ]
  • a) XY
  • b) X
  • c) YY
  • d) XX
Q.5
Fruit fly Drosophila melanogaster was found to be very suitable for experimental verification of chromosome theory of inheritance by Morgan and his colleagues because .... [ CBSE 2010 ]
  • a) It reproduce parthenogenetically
  • b) Smaller female is easily distinguishable from large male
  • c) A single mating produces two young flies
  • d) It completes life cycle in about two weeks
Q.6
Barr body occurs in .... ... [ AIIMS 2001 ]
  • a) Inter phase cell of female mammal
  • b) inter phase cell of male mammal
  • c) prophase cell of male mammal
  • d) prophase cell of female mammal
Q.7
A point mutation is ... ... [ CBSE 1995 ]
  • a) Sickle cell anaemia
  • b) Thalassemia
  • c) Night blindness
  • d) Down's syndrome
Q.8
If haploid chromosome number is 10, the monosomic number shall be .... .. [ MPPMT 2000]
  • a) 9
  • b) 18
  • c) 10
  • d) 19
Q.9
In humans, Philadelphia chromosome is formed by reciprocal translocation between chromosomes ... .... [ kerala 2001]
  • a) 9 and 21
  • b) 9 and 22
  • c) 9 and 20
  • d) 20 and 10
Q.10
Two dominant non allelic genes are 50 map units apart. the linkage is ... ... [ BHU 1997 ]
  • a) Cis type
  • b) Trans type
  • c) Complete
  • d) Absent/ incomplete
Q.11
Study the pedigree chart, What does it show? [ CBSE 2009 ]
unit-7_ch-3_que_no-461_img_no1.png
  • a) Inheritance of a condition like phenylketonuria as an autosomal recessive trait
  • b) Inheritance of a recessive sex-linked disease like haemophilia
  • c) Inheritance of sex-linked inborn error of metabolism like phenylketonuria
  • d) pedigree chart is wrong as this is not possible
Q.12
Which of the following will be colour blind ... .. [ MPPMT 1991 ]
  • a) XY
  • b) XCXC
  • c) XC X
  • d) X X
Q.13
In 'man' sex linked characters are mainly transmitted through... ... [ MPPMT 2004 ]
  • a) Autosome
  • b) Y-chromosome
  • c) X-chromosome
  • d) All the above
Q.14
Y-chromosome is .... ...
  • a) Acrocentric
  • b) Telocentric
  • c) Correns
  • d) Bridges
Q.15
A change in chromosomal number is called ... ... [ MPPMT 1979 ]
  • a) Polyploidy
  • b) Aneuploidy
  • c) Chromosomal mutation
  • d) Somatic mutation
Q.16
Chromosome theory of inheritance was proposed by .... .. [ RPMT 1996]
  • a) Sutton (1902)
  • b) Boveri (1902)
  • c) Both Sutton(1902) and Boveri (1902)
  • d) Correns ( 1909)
Q.17
Which has an additional Y-chromosome? ... [ MPPMT 2009 ]
  • a) Turner's syndrome
  • b) Down's syndrome
  • c) Klinefelter's syndrome
  • d) Super female
Q.18
Smallest segment of genetic material affected by mutation is .... ... [ AFMC 1993 ]
  • a) Recon
  • b) Cistron
  • c) Muton
  • d) Exon
Q.19
Which of the following is not a Mendelian disorder .... ... [ kerala 2010 ]
  • a) Turner's syndrome
  • b) Thalassemia
  • c) Haemophilia
  • d) Cystic fibrosis
Q.20
A sex linked trait/disease is ... ..[ AFMC 1996 ]
  • a) Colour blindness/ haemophilia
  • b) Night blindness/ albinism
  • c) Myxoedema/ beri-beri
  • d) Deafness/ tylosis
Q.21
All the seven children of a couple are males. What is the probability that eight child will also be a male.. ..... [ AMU 2011 ]
  • a) 1/2
  • b) 1/4
  • c) 1/8
  • d) 1/16
Q.22
Turner's syndrome is due to .... .. [ kerala 2004 ]
  • a) Monosomy
  • b) Disomy
  • c) Trisomy
  • d) Polyploidy
Q.23
Autosomes present in human sperm are ... .. [ Pb PMT 2000 ]
  • a) 46
  • b) 44
  • c) 23
  • d) 22
Q.24
Genes for colour blindness in humans are carried by ... .. [ MPPMT 2000 ]
  • a) Mother
  • b) Father
  • c) Both
  • d) Abnormal sex
Q.25
Phenylketonuria is autosomal recessive disorder of chromosome ... ... [ AMU 2009 ]
  • a) 11
  • b) 12
  • c) 16
  • d) 17
Q.26
Sickle cell anaemia is a disorder caused due to change in chemical nature of ... ...
  • a) α-chain of haemoglobin
  • b) β-chain of haemoglobin
  • c) Plasma protein
  • d) Both α- and β-chains of haemoglobin
Q.27
In case of incomplete linkage, the parental combination appears in ... ... [ Odisha 2012 ]
  • a) 100%
  • b) More than 50%
  • c) 25%
  • d) Less than 25%
Q.28
haploids are preferred over diploids for mutation studies because in haploids ... .. [ CBSE 1993]
  • a) Recessive mutations express immediately
  • b) Dominant mutations express immediately
  • c) Mutations are readily induced
  • d) Tissue culture is easy
Q.29
Chromosomes are made of ... ... [ MPPMT 2001 ]
  • a) DNA + Pectin
  • b) RNA + DNA
  • c) DNA + Histones
  • d) DNA only
Q.30
The gene that controls the rate of mutation of another gene is.... ... [ Pb PMT 2000 ]
  • a) Regulator gene
  • b) Inducer gene
  • c) Mutable gene
  • d) Mutator gene
Q.31
Which is incorrectly paired? ... .. [ kerala 2005 ]
  • a) sry gene --- X chromosome
  • b) 2n-2 --- Nullisome
  • c) Nucleoid --- prokaryote
  • d) Polytene chromosome --- Drosophila
Q.32
point mutation may occur due to ... ... [ AMU 2009 ]
  • a) Gain of segment of DNA
  • b) Deletion of segment of DNA
  • c) Alternation in DNA sequence
  • d) Change in a single base pair of DNA
Q.33
In Neurospora both recessive and dominant alleles express their because .....
  • a) The organism contains only one allele for a gene
  • b) Each gene has only one allele
  • c) there are two alleles for each character
  • d) Two genes control each character
Q.34
Ovum producing Klinefelter's syndrome shall have chromosome number ... .. [ MPPMT 1990 ]
  • a) 21
  • b) 22
  • c) 23
  • d) 24
Q.35
Euploidy is .... ... [ BHU 1998 ]
  • a) One chromosome more than haploid set
  • b) One chromosome more than diploid set
  • c) One chromosome less than haploid set
  • d) Exact multiple of haploid set of chromosomes
Q.36
A colour blind man marries a woman with normal vision. the offspring will be .... .. [ AMU 2011 ]
  • a) All sons colour blind
  • b) All daughter colour blind
  • c) Both A and B
  • d) All sons and daughters normal but daughters are carriers
Q.37
Chromosome complement of Down's syndromes is ... ... [ Manipur 2006 ]
  • a) 2n - 1
  • b) 2n - 1 - 1
  • c) 2n + 1
  • d) 2n + 1 + 1
Q.38
Gynaecomastia is a symptom of ... ... [ KCET 2004 ]
  • a) Turner's syndrome
  • b) Klinefelter's syndrome
  • c) Downs syndrome
  • d) SARS
Q.39
Down's syndrome has trisomy of chromosome .... ... [ JKCET 2012 ]
  • a) 20
  • b) 21
  • c) 22
  • d) 23
Q.40
Which crop is not due to induced mutations ? ... .. [ CBSE 1993 ]
  • a) Reimei of rice
  • b) Prabhat of Arhar
  • c) Sharbati Sonora of Wheat
  • d) Aruna of Castor
Q.41
Polydactyly in man is due to ... ... [ JKCMEE 2002 ]
  • a) Autosomal recessive allele
  • b) Autosomal dominant allele
  • c) Sex linked receive allele
  • d) Sex linked dominant allele
Q.42
Mutations are commonly .... .. [ AMU 2005 ]
  • a) Dominant
  • b) Co dominant
  • c) Recessive
  • d) Incomplete
Q.43
After crossing two plants, the progeny was found to be male sterile due to maternal inheritance. The gene for male sterility resides in ... ... [ CBSE 1997 ]
  • a) Nucleus
  • b) Chloroplasts
  • c) Cytoplasm
  • d) Mitochondria
Q.44
Genetic maps of chromosomes are based on the frequency of .... ... [ kerala 2006]
  • a) Non disjunction
  • b) Translocation
  • c) Dominance
  • d) Genetic recombination
Q.45
Which genotype will indicate colour blindness in male .... ... [ Bih PMT 1996]
  • a) XCY
  • b) XCYC
  • c) XCXC
  • d) ACAC
Q.46
Albinism is a result of inability of the system to convert amino acid ... ... [ Manipal 2004 ]
  • a) Alanine
  • b) Tryptophan
  • c) Lysine
  • d) Phenylalanine
Q.47
Which is not an X-linked recessive disease? [ AMU 2005 ]
  • a) β-Thalassemia
  • b) Haemophilia
  • c) Colour blindness
  • d) Glucose 6-phosphate dehydrogenase deficiency.
Q.48
greater is the distance between the two genes on a chromosome .... ..
  • a) greater is the linkage strength
  • b) lesser is the linkage strength
  • c) there is no relationship between the two
  • d) linkage strength remains unchanged
Q.49
Down's syndrome is due to ... .. [ CBSE 1992 ]
  • a) Crossing over
  • b) Linkage
  • c) Sex-linked inheritance
  • d) Non disjunction of chromosomes
Q.50
if there is complete linkage in F2 generation .... ... [AIIMS 1999]
  • a) Parental types and recombinants appear in equal ratio
  • b) Recombinants are less than parental types
  • c) Recombinants are more than parental types
  • d) There will be only parental type
0 h : 0 m : 1 s