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