Botany - Chromosomal Basis of Inheritance Model Question Paper

12th Standard EM

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Biology

Time : 02:00:00 Hrs
Total Marks : 50
    7 x 1 = 7
  1. An allohexaploidy contains

    (a)

    Six different genomes

    (b)

    Six copies of three different genomes

    (c)

    Two copies of three different genomes

    (d)

    Six copies of one genome

  2. Genes G S L H are located on same chromosome. The recombination percentage is between L and G is 15%, S and L is 50%, H and S are 20%. The correct order of genes is

    (a)

    GHSL

    (b)

    SHGL

    (c)

    SGHL

    (d)

    HSLG

  3. Changing the codon AGC to AGA represents

    (a)

    mis-sense mutation

    (b)

    non-sense mutation

    (c)

    frameshift mutation

    (d)

    deletion mutation

  4. How many map units separate two alleles A and B if the recombination frequency is 0.09?

    (a)

    900 cM

    (b)

    90 cM

    (c)

    9 cM

    (d)

    0.9 cM

  5. The following sequence represents the location of genes in a chromosome. A - B - C - M - R - S - y -Z. Which of the gene pairs will have least chance of getting inherited together?

    (a)

    A and M

    (b)

    Sand Y

    (c)

    M and Z

    (d)

    A and Y

  6. Incomplete linkage was reported by Hutchinson in ___________

    (a)

    Drosophila

    (b)

    Maize

    (c)

    Neurospora

    (d)

    Lathyrus odoratus

  7. Pick out the co-mutagen from the following:

    (a)

    Eosin

    (b)

    Mustard gas

    (c)

    Ascorbic acid

    (d)

    Nitrous acid

  8. 4 x 1 = 4
  9. T. H. Morgan

  10. (1)

    2n - 2

  11. Hugo de Vries

  12. (2)

    Sex linkage in Drosophila

  13. Monosomy

  14. (3)

    Mutation theory

  15. Nullisomy

  16. (4)

    2n - 1

    4 x 1 = 4
  17. The term crossing over was coined by_________________

    ()

    T.H. Morgan

  18. The unit of distance in genetic map is called as_____________

    ()

    Map unit or Centimorgan

  19. The "2n" condition of Carica papaya is________

    ()

    36

  20. The first man made cereal is___________

    ()

    Triticale

  21. 4 x 2 = 8
  22. What is the difference between missense and nonsense mutation?

  23. What are linked genes?

  24. Define terminalization.

  25. What is genetic mapping?

  26. 4 x 3 = 12
  27. State Coupling and Repulsion theory.

  28. What is Synapsis? Explain its types.

  29. List any three characteristic features of multiple allele.

  30. What is frame shift mutation?

  31. 3 x 5 = 15
  32. What is gene mapping? Write its uses

  33. Draw the diagram of different types of aneuploidy.

  34. Mention the name of man-made cereal. How it is formed?

*****************************************

TN 12th Standard EM Biology free Online practice tests

Reviews & Comments about 12th Biology - Botany - Chromosomal Basis of Inheritance Model Question Paper

Write your Comment