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