Q.1
D Sex-linked genes were discovered by .... ... [ Wardha 2001 ]
  • a) Johanssen
  • b) Mendel
  • c) Morgan
  • d) Muller
Q.2
male child with blood group AB is colour blind. His parents could be .. .... [ EAMCET 2002 ]
  • a) Father normal vision with blood group A, mother colour blind with group O
  • b) Father colour blind with group O, mother colour blind with blood group AB
  • c) Father normal vision with blood group A, mother colour blind with blood group B
  • d) Father colour blind with blood group O, mother normal vision with blood group O
Q.3
Down's syndrome is due to non disjunction of ... ... [ Odisha 2006]
  • a) X-chromosome
  • b) Y-chromosome
  • c) Autosome
  • d) Second chromosome of Drosophila
Q.4
In Drosophila , during organ differentiation one organ can be replaced by another like wings by legs. Genes responsible for it are ... ... [ CBSE 2000 ]
  • a) plastid genes
  • b) Homeotic genes
  • c) Complementary genes
  • d) Supplementary genes
Q.5
Which is not considered regular mitogen ... .... [ Odisha 2011 ]
  • a) UV radiation
  • b) Nuclear radiation
  • c) 2-aminopurine
  • d) Low temperature
Q.6
A diploid cell is treated with colchicine. it becomes... ... [ CBSE 2002 ]
  • a) Diploid
  • b) Monoploid
  • c) Triploid
  • d) Tetraploid
Q.7
A person with chromosome complement of XXX is .... ... [ Odisha 2008 ]
  • a) Klinefelter's syndrome
  • b) Down's syndrome
  • c) Turner's syndrome
  • d) Super female
Q.8
Triticum aestivum ( Bread Wheat) is ... ... [ AMU 1997 ]
  • a) Tetraploid
  • b) Hexaploid
  • c) Diploid
  • d) Haploid
Q.9
Of a normal couple, half the sons are haemophiliac while half the daughters are carriers. The gen is located on ... ... [ CBSE 1993 ]
  • a) X-chromosome of father
  • b) Y-chromosome of father
  • c) One X-chromosome of mother
  • d) Both the X-chromosomes of mother
Q.10
A sudden spontaneous change in structure and action of gene is called ... ... [ MPPMT 2004 ]
  • a) Variation
  • b) Allelomorph
  • c) Linkage
  • d) Mutation
Q.11
Edward's syndrome characterized by mental deficiency is caused by trisomy of chromosome ..... [ MPPMT 2002]
  • a) 5
  • b) 9
  • c) 15
  • d) 18
Q.12
Hereditary material present outside nucleus is known as ... ... [ Manipur 2009 ]
  • a) Genome
  • b) Plasmon
  • c) Proteome
  • d) Cytol
Q.13
Chromosome number of Down's syndrome/ mongolism is ... .. [ AFMC 2005 ]
  • a) 46
  • b) 47
  • c) 45
  • d) 23
Q.14
Even harmful mutation do not get eliminated from gene pool due to ... ... [ Har PMT 2000 ]
  • a) genetic drift
  • b) higher frequency due to dominant nature
  • c) being recessive and persisting in heterozygous condition
  • d) survival value
Q.15
Genetic balance of sex determination was proposed by .... ... [ MPPMT 2002 ]
  • a) Bridges
  • b) Mendel
  • c) Balbiani
  • d) Morgan
Q.16
Which is correct .... ... [ AIIMS 2011]
  • a) Birds have ZZ(female) - ZW(male) sex determination
  • b) Drosophila has XX-XY sex determination
  • c) Henking discovered Y-chromosome
  • d) Grasshoppers show X-XY sex determination
Q.17
A normal green male Maize is crossed with albino female. The progeny is albino because .... .. [ Har PMT 2000 ]
  • a) trait for albinism is dominant
  • b) The albinos have biochemical to destroy plastids derived from green male
  • c) Plastids are inherited from female parent
  • d) Green plastids of male must have mutated
Q.18
Which one is correctly matched? .... . [ CBSE 2008 ]
  • a) Erythroblastosis syndrome --- X-linked
  • b) Down's syndrome --- 44A+XO
  • c) Klinefelter's syndrome --- 44 + XXY
  • d) Colour blindness --- Y-linked
Q.19
Mutation are induced mostly by ... ... [ CBSE 2005]
  • a) UV radiations
  • b) Beta rays
  • c) Alpha rays
  • d) Gamma rays
Q.20
How many genomes are present in a typical green plant cell? .... ... [ CBSE 1998 ]
  • a) Ten
  • b) Two
  • c) Five
  • d) Three
Q.21
Monosomic and trisomic conditions are .... ... [ DPMT 2003 ]
  • a) 2n-1, 2n+1
  • b) 2n-1, 2n-2
  • c) 2n+1, 2n + 3
  • d) n , n+
Q.22
Crossing over results in . ... [ JKCMEE 2003 ]
  • a) Recombination between linked genes
  • b) linkages between genes
  • c) Segregation of gene
  • d) Dominance of genes
Q.23
Haemophilic man marries a normal homozygous female. The probability of their child being haemophilic is ... ... [ Har PMT 2005 ]
  • a) 0.00%
  • b) 25%
  • c) 50%
  • d) 75%
Q.24
Lymnaea shell coiling is due to .... .. [ DPMT 2002 ]
  • a) Maternal inheritance
  • b) Cytoplasmic inheritance
  • c) Extranuclear inheritance
  • d) All the above
Q.25
Genome does not include ... .. [MHTCET 2010]
  • a) Mapping of genes
  • b) Analysis of genome
  • c) Development of GM crops
  • d) Analysis of gene products
Q.26
Queen Victoria of England was ... ... [ KCET 2000 ]
  • a) haemophilia carrier
  • b) Colour blind
  • c) AIDS patient
  • d) Deaf
Q.27
A colour blind man has a colour bind sister but normal brother. the phenotype of parents is .... .. [ CPMT 1993]
  • a) Normal father and colour blind mother
  • b) Both parents are normal
  • c) Both parents are colour blind
  • d) Father colour blind and mother normal
Q.28
What causes mutations? .... ... [ CBSE 1996]
  • a) Colchicine
  • b) Cosmic rays
  • c) Gamma rays
  • d) Crossing over
Q.29
Which is correct ? [BHU 1990]
  • a) Multivalent formation occurs allopolyploids
  • b) Aneuploidy occurs due to chromosome doubling
  • c) Tetraploid plants may have wider and extensive distribution
  • d) Raphanobrassica is autopolyploid
Q.30
The condition of sickle cell anaemia is due to .... .. [CBSE 2006 ]
  • a) Chromosomal mutation
  • b) Silent mutation
  • c) Point mutation
  • d) Frame-shift mutation
Q.31
Assertion: A middle aged woman is having small sized breasts and undersized uterus Reason Her genotype shows XO condition of allosomes ..... .... [ AIIMS 2012 ]
  • a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
  • c) Assertion is true but, Reason is false
  • d) Assertion is false but, Reason is true
Q.32
Which one brings about point mutation? [AMU 2002 ]
  • a) 5-methyl cytosine
  • b) Guanine
  • c) Adenine
  • d) 5-Bromouracil
Q.33
Out of 8 ascospores formed in Neurospora, the arrangement is 2a:4A:2a showing .... [ CBSE 1992 ]
  • a) No crossing over
  • b) some meiosis
  • c) Second generation division
  • d) First generation division
Q.34
Haemophilia is .... ... [ MHTCET 2008 ]
  • a) Genetic disorder
  • b) Infectious disease
  • c) Metabolic disorder
  • d) Occupational disease
Q.35
In skip generation inheritance of colour blindness, the trait from a colour blind man is passed on to ..... [ EAMCET 2005]
  • a) Daughter
  • b) Son
  • c) Grand daughter
  • d) Grand son
Q.36
Hyperchromism is presence of .... ... [ BHU 1998 ]
  • a) Some chromosome more than once
  • b) Some type of chromosome less than once
  • c) Variable chromosomes in nucleus
  • d) none of the above
Q.37
Both extra-nuclear as well as nuclear materials are involved in transmission of hereditary information as .... .. [ CPMT 1991 ]
  • a) Mitochondria and plastids are having DNA
  • b) Both cytoplasm and nuclear material are equally involved in heredity
  • c) Each type of organisms have particular mitochondria or plastids
  • d) Some cells are prokaryotic
Q.38
Strength of linkage is related inversely to distance between .... .... [ AIIMS 2001 ]
  • a) Genes mutation
  • b) Chromosome mutation
  • c) Gene modification
  • d) Aneuploidy
Q.39
One barr body is found in man of genotype ... .. [ CPMT 1993 ]
  • a) XY
  • b) XXXY
  • c) XXY
  • d) XX
Q.40
A chromosome with sub-terminal centromere is .... .. [ MPPMT 1997]
  • a) Acentric
  • b) Acrocentric
  • c) Metacentric
  • d) Telocentric
Q.41
Trisomy has chromosome complement of ... .. [ DPMT 2002 ]
  • a) 2n - 1
  • b) 2n - 1 -1
  • c) 2n +1+1
  • d) 2n + 1
Q.42
Solenoid is structure of ... ... [ kerala 2006 ]
  • a) Nucleosomal organistaion with 10 nm thickness
  • b) Condensed chromatin fibre with 30nm diameter
  • c) Well organized chromatid with 700 nm thickness
  • d) Well organized chromosome with 1400 nm thickness
Q.43
Numerical change in chromosome number which is not the exact multiple of haploid genome is .... ... [ AMU 1993 ]
  • a) Triploid
  • b) Allopolyploid
  • c) Autopolyploid
  • d) Aneuploid
Q.44
Syndrome in which somatic cells contain three sex chromosomes XXY, is .... .. [ JKCET 2012]
  • a) Turner's syndrome
  • b) Down's syndrome
  • c) Klinefelter's syndrome
  • d) Super female
Q.45
Colchicine brings about ... .. [ JKCMEE 2004 ]
  • a) Gene mutation
  • b) Chromosome aberration
  • c) Quick replication
  • d) Duplication of chromosomes
Q.46
Find the correct combination. Cytoplasmic inheritance is due to .... [BHU 2008] Mitochondria 2.. Cilia Cytoplasmic particlesCell wall
  • a) 1, 2, 3 correct
  • b) 1, 2 correct
  • c) 2, 4 correct
  • d) 1, 3 correct
Q.47
Sex of a child is due to ... .. [ CPMT 1992 ]
  • a) Size of ovum
  • b) Health of father
  • c) Sex chromosome of father / sperm
  • d) Sex chromosome of mother/ ovum
Q.48
A condition of not having exact multiple of haploid set is ... .. [ JKCMEE 2003 ]
  • a) Aneuploidy
  • b) Synploidy
  • c) Polyploidy
  • d) All the above
Q.49
Monosomics are ... .. [ AMU 1991 ]
  • a) n
  • b) 2n + 1
  • c) 2n - 2
  • d) 2n - 1
Q.50
Match the columns
a) Monoploidy 2n-1
b) Monosomy 2n+1
c) Nullisomy 2n+2
d) Trisomy 2n-2
e) Tetrasomy n
- - 3n
  • a) a - 6, b - 5, c -3, d - 4, e - 2
  • b) a - 5, b - 2, c -4, d - 1, e - 3
  • c) a - 5, b - 1, c -4, d - 2, e - 3
  • d) a - 1, b - 5, c -3, d - 2, e - 4
0 h : 0 m : 1 s