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NEET Biology MCQ
Genetic Basis Of Inheritance Mcq
Quiz 7
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Q.1
Haemophilic carrier female marries a normal man. In her progeny... ...
0%
a) All daughter will have haemophilia
0%
b) All sons will have haemophilia
0%
c) 50% daughters will have haemophilia
0%
d) 50% sons will have haemophilia
Explanation
Answer : (d)
Q.2
Blackening of exposed urine in a metabolic disorder due to ... .. [ kerala 2005 ]
0%
a) Phenylalanine
0%
b) Tyrosine
0%
c) Homogentisic acid
0%
d) Valine replacing glutamic acid
Explanation
Answer : (c)
Q.3
XY sex chromosomes were discovered by ... ... [ BHU 1994 ]
0%
a) Gregor Johann Mendel
0%
b) M.J.D. White
0%
c) Nettie Stevens
0%
d) Robert Brown
Explanation
Answer : (c)
Q.4
Barr body is associated with .... ... [ BHU 2002 ]
0%
a) Autosome
0%
b) X-chromosome
0%
c) Y-chromosome
0%
d) Male sex only
Explanation
Answer : (b)
Q.5
Twenty third pair of human chromosomes are known as .... ... [ MPPMT 2002 ]
0%
a) Autosomes
0%
b) Heterosomes
0%
c) Chromatids
0%
d) Chromosomes
Explanation
Answer : (b)
Q.6
A haemophilic man marries a carrier woman. Their children will be ... ... [ Pb PMT 1999 ]
0%
a) All children haemophiliac
0%
b) One fourth children haemophiliac
0%
c) Half children haemophiliac
0%
d) One tenth children haemophiliac
Explanation
Answer : (c)
Q.7
When a certain character is inherited only through female parent, it probably represents .... ... [ AFMC 2008]
0%
a) Multiple plastid inheritance
0%
b) Cytoplasmic inheritance
0%
c) Incomplete dominance
0%
d) Mendelian nuclear inheritance
Explanation
Answer : (b)
Q.8
What type of sex determination is found in Grasshopper ... ... [CPMT 2010 ]
0%
a) XX - XY
0%
b) ZW - ZZ
0%
c) ZZ - ZY
0%
d) XX - XO
Explanation
Answer : (d)
Q.9
Chromosomes conned with sex determination are ... ... [ CPMT 1995 ]
0%
a) Autosomes
0%
b) Heterosomes
0%
c) Oxysomes
0%
d) B-chromosomes
Explanation
Answer : (b)
Q.10
A woman with albinic father marries albinic man. The proportion of her progeny is .... [ RPMT 2011 ]
0%
a) All normal
0%
b) All albinic
0%
c) 2 normal : 1 albinic
0%
d) 1 normal : 1 albinic
Explanation
Answer : (d)
Q.11
A colour blind male (XcY) marries a carrier female (CCXc. possible genotype of daughter will be .... ...
0%
a) XcXc only
0%
b) XCXC
0%
c) XCXC and XcXc
0%
d) XCXc and XcXc
Explanation
Answer : (d)
Q.12
Lyon's hypothesis is connected with ... .. [ Har PMT 2000 ]
0%
a) Number of barr bodies
0%
b) Genetic compatibility
0%
c) Genetic incompatibility
0%
d) Centromeres position
Explanation
Answer : (a)
Q.13
Number of linkage group is Pisum Sativum is ... ... [ DPMT 2003 ]
0%
a) 4
0%
b) 5
0%
c) 7
0%
d) 10
Explanation
Answer : (c)
Q.14
Presence of recessive trait is 16%. The frequency of dominant allele in population is ... ... [ DPMT 2001 ]
0%
a) 0.6
0%
b) 0.32
0%
c) 0.84
0%
d) 0.92
Explanation
Answer : (a)
Q.15
Chromatid is .....
0%
a) One half of chromosome
0%
b) haploid chromosome
0%
c) complete chromosome
0%
d) duplicate chromosome
Explanation
Answer : (a)
Q.16
In Down's syndrome of male child, the sex complement is [ CBSE 1990 ]
0%
a) XO
0%
b) XY
0%
c) XX
0%
d) XXY
Explanation
Answer : (b)
Q.17
Down's syndrome/ mongolism is due to .... .. [ DPMT 2001 ]
0%
a) Extra sex chromosome
0%
b) Extra 21st chromosome
0%
c) Extra Y-chromosome
0%
d) Deficient sex chromosome
Explanation
Answer : (b)
Q.18
More than 200 chromosomes occur in ... ....
0%
a) Chicken
0%
b) Dog
0%
c) Amoeba
0%
d) Gorilla
Explanation
Answer : (c)
Q.19
Recessive mutations are expressed in ... ... [ MPPMT 19991 ]
0%
a) Homozygous condition
0%
b) Heterozygous condition
0%
c) Next generation
0%
d) Same generation
Explanation
Answer : (a)
Q.20
A colour blind man (XCY) has a colour blind sister (XCXC) and a normal brother (XY). What is genotype of father and mother .... ... [ DPMT 1996 ]
0%
a) XCY, XCXC
0%
b) XCY, XCX
0%
c) XY, XCXC
0%
d) XY, XC
Explanation
Answer : (b)
Q.21
A harmful condition which is also a potential savior from a mosquito born infectious disease ... .. [ CBSE 2003 ]
0%
a) Thalassemia
0%
b) Sickle cell anaemia
0%
c) Leukemia
0%
d) Pernicious anaemia
Explanation
Answer : (b)
Q.22
Number of Barr bodies in XXXX female would be .... .... [ CBSE 2001 ]
0%
a) 4
0%
b) 3
0%
c) 2
0%
d) 1
Explanation
Answer : (b)
Q.23
In Drosophila XXY is female. In humans it represents an abnormal male because .... [ AIIMS 2007 ]
0%
a) Y-chromosome induces male traits in humans
0%
b) Y-chromosomes is essential for female sex in Drosophila
0%
c) Y-chromosome is not essential for male sex in humans
0%
d) none of the above
Explanation
Answer : (a)
Q.24
Which clotting factor is absent in haemophilia A ? [ W.B. 2008]
0%
a) VII
0%
b) VIII
0%
c) IX
0%
d) X
Explanation
Answer : (b)
Q.25
Women rarely experience sex-linked defects because they must be ... ... [ MPPMT 1990 ]
0%
a) Homozygous
0%
b) Carrier
0%
c) Heterozygous
0%
d) Develop immunity
Explanation
Answer : (a)
Q.26
A woman with 47 chromosmes due to presence of additinoal 21 chromosome is characterized by ... ... [ CBSE 2005 ]
0%
a) Super femaleness
0%
b) Turner's syndrome
0%
c) Down's syndrome
0%
d) Triploidy
Explanation
Answer : (c)
Q.27
Cytoplasmic male sterility is passed down ... ... [ AMU 1997]
0%
a) Through bacteriophage
0%
b) Paternally
0%
c) Maternally
0%
d) Biparental
Explanation
Answer : (c)
Q.28
Mutation is .... ...
0%
a) A change in phenotype of an organism caused by some environmental factor
0%
b) An inheritable change in genetic material
0%
c) A temporary change in structure of the nucleus
0%
d) Any one of the above
Explanation
Answer : (b)
Q.29
Alleles of different genes found on same chromosome may separate due to ... ... [ MPPMT 1993 ]
0%
a) Epistasis
0%
b) Crossing over
0%
c) Continuous variations
0%
d) Pleiotropy
Explanation
Answer : (b)
Q.30
turner's syndrome is due to ... ... [ Har PMT 2000 ]
0%
a) trisomy of chromosome 21
0%
b) trisomy of chromosome 18
0%
c) autosomal recessive gene
0%
d) absence of one sex chromosome
Explanation
Answer : (d)
Q.31
Which one is a hereditary disease/ mandolin disorder? ... . [ CBSE 1990 ]
0%
a) Cataract
0%
b) Leprosy
0%
c) Blindness
0%
d) Phenylketonuria
Explanation
Answer : (d)
Q.32
Percentage of recombination between A and B 9%, A and C 17% and B and C is 26%. The arrangement of genes would be .... ... [ Odisha 2004 ]
0%
a) A - B - C
0%
b) A - C- B
0%
c) B - C - A
0%
d) B - A - C
Explanation
Answer : (d)
Q.33
Both sickle cell anaemia and Huntington's chorea are ... ... [ AFMC 2008 ]
0%
a) Virus related diseases
0%
b) Bacteria related diseases
0%
c) Congenital disorders
0%
d) Pollution induced disorders
Explanation
Answer : (c)
Q.34
According to genetic balance theory, X/A = 1.5 will make the individual .... [BHU 2008]
0%
a) male
0%
b) Meta or super female
0%
c) Intersex
0%
d) None of the above
Explanation
Answer : (b)
Q.35
in human sperm, besides autosomes the chromosome complement contains .... .. [ KCET 1999 ]
0%
a) X and Y
0%
b) Either X or Y
0%
c) Y only
0%
d) X only
Explanation
Answer : (b)
Q.36
XX-XO sex chromosome complement occurs in .. ...
0%
a) Cockroach
0%
b) Honey bee
0%
c) Human being
0%
d) Chimpanzee
Explanation
Answer : (a)
Q.37
Who studied sex-linked inheritance for first time .... ... [ MPPMT 1993 ]
0%
a) Morgan
0%
b) Khorana
0%
c) Pasteur
0%
d) Von Helmont
Explanation
Answer : (a)
Q.38
Haemophilia is due to mutation in ... ... [ CPMT 2001 ]
0%
a) X and Y chromosomes
0%
b) Y-chromosome
0%
c) X-chromosome
0%
d) Autosomal chromosome
Explanation
Answer : (c)
Q.39
The major/ ultimate source of variations are .... .. [ CPMT 1991 ]
0%
a) Polyploidy
0%
b) Mutations
0%
c) Chromosome aberrations
0%
d) Segregation
Explanation
Answer : (b)
Q.40
Pairs of homologous chromosomes present in humans is .... .... [ Odisha 2008 ]
0%
a) 46
0%
b) 44
0%
c) 23
0%
d) 22
Explanation
Answer : (c)
Q.41
The technique employed in human genetic counseling is .... ... [ kerala 2005 ]
0%
a) Serological technique
0%
b) Polyploidy
0%
c) Pedigree analysis
0%
d) Genetic engineering
Explanation
Answer : (c)
Q.42
Who used frequency of recombination between gene pairs on the schromosome
0%
a) Alfred Sturtevant
0%
b) Gregor Mendel
0%
c) Correns
0%
d) Tschemark
Explanation
Answer : (a)
Q.43
Girl of normal vision whose father was colour blind marries a man of normal vision whose father was also colour blind. The sons of this marriage would be ... ...[AIIMS 2008 ]
0%
a) All normal
0%
b) All colour blind
0%
c) 50% colour blind
0%
d) 25% colour blind
Explanation
Answer : (c)
Q.44
Gene located on mitochondrial DNA bring about ... ... [ HarPMT 2000 ]
0%
a) Paternal inheritance
0%
b) Maternal inheritance
0%
c) Biparental inheritance
0%
d) There is no inheritance
Explanation
Answer : (b)
Q.45
XXY person suffers from ... .. [ AFMC 2011]
0%
a) Down's syndrome
0%
b) Klinefelter's syndrome
0%
c) AIDS
0%
d) Turner's syndrome
Explanation
Answer : (b)
Q.46
A disease sometimes found in persons above 40 which is characterized by poor CNS coordination, forgetfulness and tremor of hands is ... ... [ Manipal 2001 ]
0%
a) Epilepsy
0%
b) Alzheimer's disease
0%
c) Migraine
0%
d) Schizophrenia
Explanation
Answer : (b)
Q.47
Which one of the following carries extra nuclear genetic material? .... .. [ AIIMS 2001 ]
0%
a) Golgi apparatus
0%
b) Ribosomes
0%
c) Chromosome
0%
d) Plastids / Mitochondria
Explanation
Answer : (d)
Q.48
Phenylketonuria is genetic disorder caused by a defect in metabolism of .... [ kerala 2004 ]
0%
a) Fatty acids
0%
b) Polysaccharides
0%
c) Amino acids
0%
d) Vitamins
Explanation
Answer : (c)
Q.49
In Neurospora, 8 ascospores are formed instead ofthis indicates.. .... [ BHU 1993]
0%
a) One meiosis
0%
b) Two meiosis
0%
c) Two mitosis
0%
d) Meiosis followed by mitosis
Explanation
Answer : (d)
Q.50
DNA is associated with basic protein .... ... [ BHU 1998 ]
0%
a) Albumin
0%
b) Nonhistone
0%
c) Histone
0%
d) Both A and C
Explanation
Answer : (c)
0 h : 0 m : 1 s
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