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MCQs

Total Questions : 60 | Page 6 of 6 pages
Question 51. How many males are typically born with XYY chromosomes?
  1.    1 in 10,000
  2.    1 in 500
  3.    1 in 10
  4.    1 in 1000
 Discuss Question
Answer: Option D. -> 1 in 1000
Answer: (d).1 in 1000
Question 52. Which of following diseases cannot be inherited by females?
  1.    x linked
  2.    y linked
  3.    silent mutations
  4.    Tay Sach's
 Discuss Question
Answer: Option B. -> y linked
Answer: (b).y linked
Question 53. Which of following terms denotes tetraploidy?
  1.    4n
  2.    4n+1
  3.    2n+2
  4.    3n-1
 Discuss Question
Answer: Option A. -> 4n
Answer: (a).4n
Question 54. Which of following characteristics is present in females born with XXX?
  1.    slightly taller than usual
  2.    slightly darker
  3.    obese
  4.    short
 Discuss Question
Answer: Option A. -> slightly taller than usual
Answer: (a).slightly taller than usual
Question 55. Inactive X chromosome in female cell forms a
  1.    barr fiber
  2.    condensed body
  3.    chromatin
  4.    barr body
 Discuss Question
Answer: Option D. -> barr body
Answer: (d).barr body
Question 56. Work of which of following scientist was first hint towards mateRNAl inheritance of mitochondria?
  1.    Watson
  2.    carl Correns
  3.    crick
  4.    Mendel
 Discuss Question
Answer: Option B. -> carl Correns
Answer: (b).carl Correns
Question 57. When an organism has more than one sets of chromosomes in somatic cells, it's known as
  1.    Proploidy
  2.    Multiploidy
  3.    polyploidy
  4.    Monoploidy
 Discuss Question
Answer: Option C. -> polyploidy
Answer: (c).polyploidy
Question 58. If a broken fragment of a chromosome joins to a non-homologous chromosome, it results in
  1.    duplication
  2.    inversion
  3.    rotation
  4.    translocation
 Discuss Question
Answer: Option D. -> translocation
Answer: (d).translocation
Question 59. How many mutations have been found so far that cause Leber?s hereditary optic neuropathy?
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option D. -> 4
Answer: (d).4
Question 60. If a deleted segment of a chromosome gets attached to another chromatid it results in
  1.    inversion
  2.    duplication
  3.    deletion
  4.    addition
 Discuss Question
Answer: Option B. -> duplication
Answer: (b).duplication

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