Q.1
Mutations that develop suddenly in nature are .... ... [ HPPMT 2007 ]
  • a) Spontaneous
  • b) Induced
  • c) Gene mutations
  • d) Chromosomal mutation
Q.2
Where are Barr bodies found .... .. [ AFMCE 2010]
  • a) Ova
  • b) Sperms
  • c) Somatic cells of man
  • d) Somatic cells of woman
Q.3
Seedless watermelons have been obtained through ... .... [ CPMT 2001 ]
  • a) Vegetative propagation
  • b) Haploidy
  • c) Triploidy
  • d) Gibberellin application
Q.4
In a pedigree analysis ȷ = 0 reprents ... ... [ kerala 2008 ]
  • a) Consanguineous mating
  • b) Affected parents
  • c) Siblings
  • d) Unrelated mating
Q.5
AS per latest information human genome has ... ... [ Uttarakhand 2001 ]
  • a) 3,00,000 gene
  • b) 30, 000 gene
  • c) 3,000 gene
  • d) 300 gene
Q.6
Amino acid substituted in sickle cell anaemia is ... ... [ kerala 2004 ]
  • a) Glutamic acid for valine in alpha chain
  • b) Glutamic acid for valine is beta chain
  • c) Valine for glutamic acid in alpha chain
  • d) Valine for glutamic acid in beta chain
Q.7
Complete haploid set of chromosomes of a species is .... .. [ CPMT 210]
  • a) Genome
  • b) Genotype
  • c) Genetic code
  • d) Allele
Q.8
Recessive mutation is not expressed in ... ... [ DPMT 1996 ]
  • a) Homozygous male
  • b) Heterozygous male
  • c) Heterozygous female
  • d) Homozygous female
Q.9
Down's syndrome is due to .... ... [ MPPMT 1997 ]
  • a) Autosome
  • b) Sex chromosome
  • c) Sex-linked disease
  • d) Duplication
Q.10
Morgan proposed that genetic exchange of recombination occurs in the region of .... [ HPPMT 2007 ]
  • a) Chiasmata
  • b) Linkage
  • c) Centromere
  • d) Telomere
Q.11
Out of A-T, G-C pairing, bases of DNA may exist in alternate valiancy state owing to arrangement called .... ... [ CBSE 1994 ]
  • a) Analogue substitution
  • b) Tautomerisational mutation
  • c) Frame-shift mutation
  • d) Point mutation
Q.12
One of the following is holandric inheritance ...... .. [ EAMCET 2002 ]
  • a) Haemophilia
  • b) Epidermolysis
  • c) Webbed toes
  • d) Turner's syndrome
Q.13
Primary source of allelic variation is ... ... [ AIIMS 2005 ]
  • a) Independent assortment
  • b) Recombination
  • c) Mutation
  • d) Polyploidy
Q.14
In heredity the genes are obtained from .... ... [ Bih PMT 1996]
  • a) Father
  • b) Mother
  • c) Both
  • d) None of the above
Q.15
One of the following is a random process... ... [ AMU 2000 ]
  • a) Variations
  • b) Adaptations
  • c) Evolution
  • d) Mutations
Q.16
Number of linkage group in Escherichia coil is .... ... [ DPMT 2007 ]
  • a) 1
  • b) 2
  • c) 4
  • d) 5
Q.17
A child gets sex-linked traits from ... ... [ Bih PMT 1994 ]
  • a) Father
  • b) Mother
  • c) Both father and mother
  • d) None of the above
Q.18
Which of the following discoveries resulted in Nobel Prize .... ... [ CBSE 2003 ]
  • a) Recombination of linked genes
  • b) X-rays induce sex-linked recessive lethal mutations
  • c) Genetic Engineering
  • d) Cytoplasmic inheritance
Q.19
X-rays cause mutation by .... .. [ BHU 2001 ]
  • a) transition
  • b) transversion
  • c) deletion
  • d) base substitution
Q.20
Shape of chromosomes is determined by position of ... ... [ CPMT 2001 ]
  • a) Centrosome
  • b) Centromere
  • c) Telomere
  • d) Micromere
Q.21
Which one is triploid ... .. [ BHU 1996 ]
  • a) Mango
  • b) Wheat
  • c) Orange
  • d) Banana
Q.22
Sex-linked characters have a district feature of ... ... [ BHU 2006 ]
  • a) Occurrence on X-chromosome
  • b) Occurrence on Y-chromosome
  • c) Non crises-cross inheritance
  • d) Criss-cross inheritance
Q.23
The condition of an extra chromosome in addition to its homologous pair is ... .. [ KCET 2005 ]
  • a) Trisomy
  • b) Monosomy
  • c) Polyploidy
  • d) Nullisomy
Q.24
In cystic fibrosis there is ... ....
  • a) Failure of chloride ion transport
  • b) Mucous clogging of lungs
  • c) Defective functioning
  • d) All the above
Q.25
Linkage in plants was first shown in ... .. [ MPPMT 2000 ]
  • a) Zea mays
  • b) lathyrus odoratus
  • c) Oenothera lamarckiana
  • d) Pisum sativum
Q.26
Larva of Bonellia settling near proboscis of adult female develops into male due to ... ... [ MPPMT 1995 ]
  • a) Substances secreted by proboscis
  • b) Electrolysis in water
  • c) Oxygen in environment
  • d) Carbon dioxide in environment
Q.27
The phenomenon of exchange of segments between nonsister chromatids/ paternal and maternal chromosomes is called .... .. [ DPMT 2010]
  • a) Linkage
  • b) Recombination
  • c) Crossing over
  • d) Segregation
Q.28
Which one id de novo mutation? [ AMU 1997 ]
  • a) TT × TT → TT
  • b) tt × tt → Tt
  • c) Tt × tt → Tt
  • d) Tt × Tt → TT, Tt, tt
Q.29
Genes present in the cytoplasm of eukaryotic cells are found in .... ... [ AIIMS 2006 ]
  • a) Mitochondria and inherited via egg cytoplasm
  • b) Lysosomes and peroxisomes
  • c) Golgi bodies and SER
  • d) Plastids and inherited via male gametes
Q.30
haploid chromosome number of body cells is ... ... [ manipal 2005 ]
  • a) 21
  • b) 22
  • c) 23
  • d) 46
Q.31
Mustard gas was used as a chemical mutagen for the first time by .... .. [ AMU 2003 ]
  • a) Muller
  • b) Alter Berg
  • c) Auerbach and Robinson
  • d) Stadler
Q.32
A recessive mutation is .... .. [ Odisha 2004 ]
  • a) Not expressed
  • b) Rarely expressed
  • c) Expressed only in homozygous and hemizygous states
  • d) Expressed only in hetrozygous state
Q.33
What map unit (Centimorgan) is adopted in the construction of genetic maps? [NEET 2019]
  • a) A unit of distance between two expressed genes representing 10% cross over.
  • b) A unit of distance between two expressed genes representing 100% cross over.
  • c) A unit of distance between genes on chromosomes, representing 1% cross over.
  • d) A unit of distance between genes on chromosomes, representing 50% cross over.
Q.34
The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by : [ NEET 2019]
  • a) T.H. Morgan
  • b) Gregor J. Mendel
  • c) Alfred Sturtevant
  • d) Sutton Boveri
Q.35
Which of the following pairs is wrongly matched ? [NEET 2018]
  • a) XO type sex : Grasshopper determination
  • b) ABO blood grouping : Co-dominance
  • c) Starch synthesis in pea : Multiple alleles
  • d) T.H. Morgan : Linkage
Q.36
Select the correct statement : [NEET 2018]
  • a) Spliceosomes take part in translation.
  • b) Punnett square was developed by a British scientist.
  • c) Franklin Stahl coined the term ‘‘linkage’’.
  • d) Transduction was discovered by S. Altman.
Q.37
A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by [NEET 2018]
  • a) Only grandchildren
  • b) Only sons
  • c) Only daughters
  • d) Both sons and daughters
Q.38
Select the incorrect match : [NEET 2018]
  • a) Submetacentric chromosomes – L-shaped chromososmes
  • b) Allosomes – Sex chromosomes
  • c) Lampbrush chromosomes – Diplotene bivalents
  • d) Polytene chromosomes – Oocytes of amphibians
Q.39
Carrier female marries a normal vision male. How many daughters would be colour blind carriers? [ Wardha 2011]
  • a) Zero
  • b) 25%
  • c) 50%
  • d) 100%
Q.40
Chromosome aberration occurs due to ... ... [ CPMT 1998 ]
  • a) Aneuploidy
  • b) Polyploidy
  • c) Physical effects
  • d) All the above
Q.41
An octamer of four histones complex with DNA is called ... ... [ AMU 2002 ]
  • a) Endosome
  • b) Nucleosome
  • c) Raff
  • d) Nucleotin
Q.42
Distance between two linked genes is measured in map units that depict ... ... [ AIIMS 1998 ]
  • a) ratio of crossing over between them
  • b) cross-over value
  • c) number of genes between them
  • d) both B and C
Q.43
Select the incorrect statement from the following ... .. [ CBSE 2009 ]
  • a) Baldness is a sex-limited trait
  • b) Linkage is an exception to the principle of independent assortment
  • c) Galactosemia is an inborn error of metabolism
  • d) Small population size results in random genetic drift in a population
Q.44
Melanuria ( black urine) is caused by abnormal catabolism of .... ... [ pB. PMT 2005]
  • a) Alanine
  • b)Tyrosine
  • c) Proline
  • d) Tryptophan
Q.45
The male has a mutation in his mitochondria. During segregation, the mutation is found in ... .. [ CBSE 2004]
  • a) None of the progeny
  • b) One third of progeny
  • c) Half of progeny
  • d) Whole of progeny
Q.46
The term mutation was given by ... .. [ Bihar PMT 2000 ]
  • a) De Vries
  • b) Mendel
  • c) Darwin
  • d) Lamarck
Q.47
Diethyl sulphate is ... .. [ Wardha 2003 ]
  • a) Insecticide
  • b) Antibiotic
  • c) Mutagen
  • d) Fusogen
Q.48
Turner's syndrome is ... ... [ AMU 2012 ]
  • a) Case of monosomy
  • b) Cause of sterility in females
  • c) Absence of Barr body
  • d) All the above
Q.49
male is haploid in . ... [ uttarakhand 2001]
  • a) lizard
  • b) Cockroach
  • c) Honey bee
  • d) Bats
Q.50
What is correct? [ kerala 2007 ]
  • a) Monosomy and nullisomy are two types of euploidy
  • b) Polyploidy is more common in animals than in plants
  • c) Polyploidy occur due to failure in separation of complete sets of chromosomes
  • d) 2n - 1 is trisomy
0 h : 0 m : 1 s