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MCQs

Total Questions : 49 | Page 4 of 5 pages
Question 31.  Which of the following denotes a pair of contrasting characters?
  1.    Alleles
  2.    Phenotype
  3.    Homozygous
  4.    Genotype
 Discuss Question
Answer: Option A. -> Alleles
Question 32. . A map of chromosomes that utilizes cloned and sequenced DNA fragments rather than genetic markers is known as
  1.    a physical map
  2.    a genetic map
  3.    a cloning map
  4.    none of these
 Discuss Question
Answer: Option A. -> a physical map
Question 33. . In an organism, the chromosome number is maintained constant because of
  1.    independent assortment
  2.    crossing over
  3.    DNA duplication
  4.    synapsis
 Discuss Question
Answer: Option C. -> DNA duplication
Question 34. . Which of the following is correct when a character shows continuous variation assuming a normal distribution?
  1.    It is governed by many genes with small cumulative effect
  2.    It is not controlled genetically
  3.    Many of the variation is due to fluctuation of climate
  4.    None of the above
 Discuss Question
Answer: Option A. -> It is governed by many genes with small cumulative effect
Question 35. . How many chromosomes are there in the budding yeast (S. cerevisiae)?
  1.    16
  2.    17
  3.    18
  4.    20
 Discuss Question
Answer: Option A. -> 16
Question 36. .  Raphanobrassica is a classical example of
  1.    aneuploidy
  2.    nullisomy
  3.    allopolyploidy
  4.    None of the above
 Discuss Question
Answer: Option C. -> allopolyploidy
Question 37. . How does dosage compensation in Drosophila occur?
  1.    Hypertranscription of male X chromosome
  2.    Hypotranscription of female X chromosome
  3.    X inactivation in females
  4.    Chimerism
 Discuss Question
Answer: Option A. -> Hypertranscription of male X chromosome
Question 38. . A cross shaped (+) or a ring involving four chromosomes may be formed during metaphase I in case of
  1.    translocation heterozygote
  2.    deficiency
  3.    haploid organism
  4.    duplication
 Discuss Question
Answer: Option A. -> translocation heterozygote
Question 39. . Incase of inversion when the inverted segment of chromosome includes centromere, it is known as
  1.    paracentric inversion
  2.    double inversion
  3.    inverted inversion
  4.    pericentric inversion
 Discuss Question
Answer: Option D. -> pericentric inversion
Question 40. . Hairy wing character of Drosophila is due to
  1.    duplication in region of chromosome
  2.    deletion in region of chromosome
  3.    due to presence of additional X-chromosome
  4.    due to a point mutation
 Discuss Question
Answer: Option A. -> duplication in region of chromosome

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