Q.1
Extra nuclear genes are present in ... ... [ CBSE 2000 ]
  • a) Cytoplasm
  • b) E.R. and cytoplasm
  • c) Ribosome and cytoplasm
  • d) Mitochondria and cytoplasmic particles
Q.2
Maize with 10 pairs of chromosomes has linkage groups ... .. [ MPPMT 1999]
  • a) 40
  • b) 20
  • c) 10
  • d) 5
Q.3
Match the column
a Sickle cell anaemia 1. Sex-linked
b Colour blindness 2. Autosomal 7
c phenylketonuria 3. Autosomal chromosome 11
d Cystic fibrosis 3. Autosomal chromosome 4
e Huntington's chorea 4. Autosomal chromosome 12
  • a) a-3, b-5, c-1, d-2, e-4
  • b) a-3, b-1, c-5, d-2, e-4
  • c) a-4, b-1, c-5, d-2, e-3
  • d) a-5, b-1, c-2, d-3, e-4
Q.4
Which of the following is a case of auto-allopolyploidy?
  • a) AA, AA, AA
  • b) AA, AA, BB
  • c) AA-1
  • d) 2n-2
Q.5
Probability of all the four sons of a couple is ... .. [ CBSE 2001 ]
  • a) 1/14
  • b) 1/8
  • c) 1/16
  • d) 1/32
Q.6
The phenomenon of movement of DNA segment from one chromosome to another is .... ... [ DPMT 1999 ]
  • a) DNA replication
  • b) DNA transposition
  • c) DNA recombination
  • d) DNA hybridisation
Q.7
Most of the mutations are ... ...
  • a) Forward
  • b) Backward
  • c) Reversible
  • d) Lethal
Q.8
Diagrammatic representation of chromosomes is .... .. [ manipal 2005 ]
  • a) Karyotype
  • b) Idiogram
  • c) Chromosome map
  • d) Phenogram
Q.9
What is not true of haemophilia? [ kerala 2003]
  • a) Bleeder's disease
  • b) Royal disease
  • c) X-linked disorder
  • d) Y-linked disorder
Q.10
Under electron microscope, chromatin fibers appears like beads in a string. the beads are ... ... .. [ AMU 2001 ]
  • a) Chromomeres
  • b) Nucleosomes
  • c) Solenoids
  • d) Chromonema
Q.11
A female fruit fly heterozygous for sex-linked genes is mated with normal male fruit fly. Male specific chromosome will enter the egg cells in proportion of .... ... [ CBSE 1997]
  • a) 1 : 1
  • b) 2:1
  • c) 3:1
  • d) 7:1
Q.12
Which one is not related to chromosomal abnormality? [ MPPMT 1995 ]
  • a) Barr body
  • b) Trisomy
  • c) Monosomy
  • d) Nullisomy
Q.13
Choose the correct combination .... [ kerala 2006 ]
a) Walter Sutton; 1) Discovered penicillin
b) Thomas Hunt Morgan 2) Discovered chromosomal basis of heredity
c) James Watson 3) Described the phenomenon of linkage and crossing over
d) Alexander Fleming 4) Discovered double helical structure of DNA
  • a) a - 1, b - 4, c - 2, d - 3
  • b) a - 2, b - 3, c - 1, d - 4
  • c) a - 3, b - 2, c - 1, d - 4
  • d) a - 2, b - 3, c - 4, d - 1
Q.14
Human chromosomes have been grouped on the basis of size and centromere into types ... ... [ MPPMT 2002 ]
  • a) 5
  • b) 6
  • c) 7
  • d) 10
Q.15
Hexaploid or modern wheat developed through .... .. [ AIIMS 1997 ]
  • a) Hybridomas
  • b) Chromosome doubling
  • c) Hybridisation
  • d) Hybridisation and chromosome doubling
Q.16
haemophilia is more common in males because it is a .... .. [ CBSE 1990 ]
  • a) Recessive character carried by chromosome
  • b) Dominant character carried by chromosome
  • c) Dominant trait carried by X-chromosome
  • d) Recessive trait carried by X-chromosome
Q.17
AB genes are linked. What is genotype of the progeny in a cross between AB/ab and aabb. .... [ CBSE 2001 ]
  • a) AABB and aabb
  • b) AaBb and aabb
  • c) AAbb and aaBB
  • d) AaBb and AaBb
Q.18
A mutation limited to substitution of one nucleotide for another is called .... ... [ kerala 2008 ]
  • a) Base inversion
  • b) Point mutation
  • c) Translocation
  • d) frame shift mutation
Q.19
In XO type of sex determination .... .. [ kerala 2012 ]
  • a) Females produce two types of gametes
  • b) Males produce two types of gametes
  • c) Females produce single type of gametes
  • d) Males produce single type of gametes
Q.20
Genetic map is one that ... ... [ CBSE 2003 ]
  • a) Establishes sites of the gene on a chromosomes
  • b) Establishes the various stages in gene evolution
  • c) Shows the stages during cell division
  • d) Shows distribution of various species in a region
Q.21
The phenomenon of closely placed genes being inherited together is ... ... [ DPMT 2008]
  • a) Linkage
  • b) Crossing over
  • c) Gene interaction
  • d) Qualitative inheritance
Q.22
DNA parts which can switch their position are .... ... [ CBSE 1998 ]
  • a) Exons
  • b) Introns
  • c) Cistrons
  • d) transposons
Q.23
Paramecium shows cytoplasmic inheritance through ... ... [ BHU 2012 ]
  • a) Chromosome
  • b) nuclear gene
  • c) Kappa particles
  • d) DNA
Q.24
Haemophiliac man marries a normal woman. their offspring will be ... ... [ MPPMT 1993 ]
  • a) All normal
  • b) All haemophiliac
  • c) All boys haemophiliac
  • d) All girls haemophiliac
Q.25
Given below is a pedigree chart with symbols for sex-linked trait in humans The trait of the above pedigree chart is .... .. [ AIIMS 2005 ]
unit-7_ch-3_que_no-270_img_no1.png
  • a) Recessive Y-linked
  • b) Recessive X-linked
  • c) Dominant Y-linked
  • d) Dominant X-linked
Q.26
In human beings 45 chromosomes/ single X/XO abnormality causes ... ... [ CBSE 1993]
  • a) Down's syndrome
  • b) Klinefelter's syndrome
  • c) Turner's syndrome
  • d) Edward's syndrome
Q.27
Colchicine was discovered by .... .. [ AMU 2003 ]
  • a) Flemming
  • b) Blakeslee
  • c) Dumas
  • d) Muller
Q.28
Find out the mismatch .. ... [ CET Chd. 2001 ]
  • a) Klinefelter's syndrome - XO
  • b) Haemophilia - sex linked
  • c) Down's syndrome - autosomal aneuploidy
  • d) Turner's syndrome - females with retarded sexual development
Q.29
Foetal sex can be determined from cells present in amniotic fluid by looking for ... ... [ CBSE 1997]
  • a) Kinetochores
  • b) Chiasmata
  • c) Barr bodies and sex chromosomes
  • d) Autosomes
Q.30
Autosomes in humans are ... ... [ MPPMT 1995 ]
  • a) 11 pairs
  • b) 22 pairs
  • c) 23 pairs
  • d) 43 pairs
Q.31
A diseased man marries a normal woman. The couple has 3 daughter and 5 sons. the daughter are diseased while the sons are normal. the gene of the disease is .... ... [ CBSE 2002 ]
  • a) Sex-linked recessive
  • b) Sex-linked dominant
  • c) Autosomal character
  • d) Sex limited character
Q.32
Mental retardation associated with chromosomal abnormality is due to .... .[ CBSE 1998 ]
  • a) Reduction in X-complement
  • b) Increase in X-complement
  • c) Moderate increase in Y-complement
  • d) large increase in Y-complement
Q.33
Assertion Polytene chromosomes have a high amount of DNA Reason: Polytene chromosomes are formed by repeated replication of chromosomal DNA without separation of chromatids .... .. [ AIIMS 2006 ]
  • 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.34
Sex is determined in human beings ... .. [BHU 2000 ]
  • a) By ovum
  • b) At time of fertilization
  • c) 40 days after fertilization
  • d) seventh to eight week when genitals differentiate in foetus
Q.35
Colour blindness occurs due to .... ... [ Odisha 2011 ]
  • a) Recessive gen X-chromosome
  • b) Dominant gene on X-chromosome
  • c) Recessive gene on an autosome
  • d) Dominant gene on an autosome
Q.36
Male sex is determined in human zygote by ... .. [ Pb. PMT 1999 ]
  • a) Nutrition of mother
  • b) Strength of father
  • c) Chromosome composition of egg
  • d) Chromosome composition of sperm
Q.37
Mutations altering nucleotide sequence within a gene are .... ... [ CPMT 2004 ]
  • a) frame shift mutations
  • b) Base pair substitution
  • c) Both A and B
  • d) None of the above
Q.38
A normal woman whose father was colour blind marries a normal man. the progeny would be .... ... ] kerala 2003 ]
  • a) Sons normal, daughter colour blind
  • b) Sons colour blind, daughter normal
  • c) 50% sons colour blind, remaining 50% normal
  • d) Both sons and daughter are colour blind
Q.39
Hypertrichosis of pinna occurs only in male because ... ... [ KCET 2008 ]
  • a) Estrogen suppresses the trait in females
  • b) It is induced by testosterone in males
  • c) Gene for it is present only on Y-chromosome
  • d) Its gene is recessive in females and dominant in males
Q.40
Sex limited and sex-linked genes are located on ... ... [ Pb.PMT 2005 ]
  • a) Autosomes
  • b) X-chromosome
  • c) Y-chromosome
  • d) Both A and B
Q.41
X- ray induced mutations were introduced in maize for the first time nu .... ... [ AIIMS 1996 ]
  • a) Muller
  • b) Stadler
  • c) Morgan
  • d) Singleton
Q.42
Accumulation of protein, amyloid β-peptide, in human brain causes ... ... [ kerala 2006 ]
  • a) Addison's disease
  • b) Huntington's disease
  • c) Alzheimer's disease
  • d) Motor neuron diseases
Q.43
A woman has a child with Klinefelter's syndrome. Number of barr bodies present in the child is .... ... [ Har.PMT 2000 ]
  • a)One
  • b) Two
  • c) Three
  • d) None
Q.44
A colour blind woman marries a normal vision male. in the offspring ... ... [ CBSE 1994 ]
  • a) Both sons and daughters are colour blind
  • b) All daughters are colour blind
  • c) All sons are normal
  • d) All sons are colour blind, daughters carriers
Q.45
A man is sterile due to improper development of testis which has an additional X-chromosome. he is suffering from ... ... [ MPPMT 2002 ]
  • a) Turner's syndrome
  • b) Huntington's disease
  • c) Klinefelter's syndrome
  • d) Marfan's syndrome
Q.46
A mutation at a gene locus changes a character due to change in ... ... [ CBSE 2004 ]
  • a) DNA replication
  • b) Protein synthesis pattern
  • c) RNA transcription pattern
  • d) Protein structure
Q.47
Single step large mutation leading to specification ... ... [ kerala 2010 ]
  • a) Founder effect
  • b) Adaptive radiation
  • c) Saltation
  • d) Branching descent
Q.48
Determination of percentage of crossing over between two linked genes is important in ... .... [ AMU 1999 ]
  • a) Maintaining heterozygosity in population
  • b) Indicating relative position of genes in chromosomes
  • c) Fixation of heterosis in organisms
  • d) Explaining the phenomenon of coupling and repulsion
Q.49
Study the pedigree chart of certain family given here and select the correct conclusion .... ... [CBSE 2010 ]
unit-7_ch-3_que_no-300_img_no1.png
  • a) The female parent is heterozygous
  • b) The parents could not have had a normal daughter for this character
  • c) The trait under study could not be colour blindness
  • d) The male parent in homozygous could not be colour blindness
Q.50
Genome represents ... ... [ BHU 1991 ]
  • a) Haploid chromosomes set
  • b) Complete chromosomes set
  • c) Diploid chromosome set
  • d) All the gene present in the population
0 h : 0 m : 1 s