BOT/V/07 Student's Copy
2 0 1 8
Pre-CBCS
5th Semester
BOTANY
SEVENTH PAPER
Cytogenetics, Plant breeding and Bioinformatics
Full Marks 55
Time 2½ hours
PART A—OBJECTIVE
Marks 20
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 5
Tick the correct answer in the brackets provided 1×5=5
1. The thinnest fibre of the cytoskeleton is
microfilaments
microtubules
macrotubules
intermediate filaments
/327 1 Contd.
2. Aneuploidy refers to
gain of complete chromosome set
loss of complete chromosome set
gain or loss of complete chromosome set
gain or loss of one or more chromosome
3. The inheritance of kappa particles in Paramecium is an example of
extra-nuclear inheritance through
mitochondria
plastid
endosymbionts
ribosomes
4. Transition mutation involves the substitution of a
pyrimidine with a purine
purine with a pyrimidine
purine with a purine and pyrimidine with a pyrimidine
pyrimidine with a purine and purine with a pyrimidine
5. A biological database for nucleotide sequence maintained by the NCBI is
BLAST
FASTA
Swiss-Prot
gene bank
BOT/V/07/327 2 Contd.
SECTION—B
Marks 15
Write notes on the following 3×5=15
1. Microtubules
2. Segmental allopolyploidy
3. Multiple allelism
4. Types of mutation
5. DNA database
PART B—DESCRIPTIVE
Marks 35
The figures in the margin indicate full marks for the questions
1. Write short notes on any two of the following 3½×2=7
Deletion
Inversion
Structure of chromosomes
OR
What is duplication? Give an account of the different types of duplication
and its cytological and genetic consequences.
2. Briefly describe any two of the following 3½×2=7
Allopolyploidy
Trisomics
Monosomics
OR
Describe the origin and production of autopolyploids with the help of
suitable examples. 7
BOT/V/07/327 3 Contd.
3. Write short notes on any two of the following 3½×2=7
Karyotype
Self-sterility in plants
Genetic maps
OR
Write explanatory note on plastid inheritance in Mirabilis jalapa with the
help of a suitable diagram. 7
4. Briefly describe any two of the following 3½×2=7
Mass selection
Hybridization
Theories of hybrid vigour
OR
Give an account of chemical mutagens and the mechanism of their action. 7
5. Write short notes on any two of the following 3½×2=7
DNA sequence alignment
Bioinformatics
Protein database
OR
What is BLAST? Describe the different types of BLAST programs available.