Sail E0 Webinar

MCQs

Total Questions : 49 | Page 2 of 5 pages
Question 11. Raphanobrassica is a classical example of
  1.    allopolyploidy
  2.    aneuploidy
  3.    None of these
  4.    nullisomy
 Discuss Question
Answer: Option A. -> allopolyploidy
Question 12. Which of the following is correct when a character shows continuous variation assuming a normal distribution?
  1.    Many of the variation is due to fluctuation of climate
  2.    It is not controlled genetically
  3.    None of these
  4.    It is governed by many genes with small cumulative effect
 Discuss Question
Answer: Option D. -> It is governed by many genes with small cumulative effect
Question 13. In an organism, the chromosome number is maintained constant because of
  1.    independent assortment
  2.    DNA duplication
  3.    synapsis
  4.    crossing over
 Discuss Question
Answer: Option B. -> DNA duplication
Question 14. In a dihybrid cross, the progeny of an Fl individual (hetero2ygous for both characters) will show a phenotypic ratio of
  1.    1:1:1:1
  2.    1:2:2:1
  3.    3:1:1:3
  4.    9:3:3:1
 Discuss Question
Answer: Option A. -> 1:1:1:1
Question 15. How many chromosomes are there in the budding yeast (S. cerevisiae)?
  1.    20
  2.    18
  3.    16
  4.    17
 Discuss Question
Answer: Option C. -> 16
Question 16. Incase of inversion when the inverted segment of chromosome includes centromere, it is known as
  1.    paracentric inversion
  2.    inverted inversion
  3.    double inversion
  4.    pericentric inversion
 Discuss Question
Answer: Option D. -> pericentric inversion
Question 17. A cross shaped (+) or a ring involving four chromosomes may be formed during metaphase I in case of
  1.    deficiency
  2.    haploid organism
  3.    translocation heterozygote
  4.    duplication
 Discuss Question
Answer: Option C. -> translocation heterozygote
Question 18. A diagram depicting chromosomes of haploid set of an organism ordered in a series of decreasing size is known as
  1.    karyogram
  2.    idiogram
  3.    chromogram
  4.    zymogram
 Discuss Question
Answer: Option B. -> idiogram
Question 19. How does dosage compensation in Drosophila occur?
  1.    Hypotranscription of female X chromosome
  2.    Chimerism
  3.    Hypertranscription of male X chromosome
  4.    X inactivation in females
 Discuss Question
Answer: Option C. -> Hypertranscription of male X chromosome
Question 20. Hairy wing character of Drosophila is due to
  1.    duplication in region of chromosome
  2.    due to a point mutation
  3.    deletion in region of chromosome
  4.    due to presence of additional X-chromosome
 Discuss Question
Answer: Option A. -> duplication in region of chromosome

Latest Videos

Latest Test Papers