Nalanda Open University
Annual Examination 2017
B.Sc. Botany (Honours), Part-III
Paper-VIII (Genetics)
Time: 3.00 Hrs. Full Marks: 80
Answer any five questions. Questions No. 1 is compulsory. All questions carry equal marks.
1. Multiple choice questions
A cross in which parents differ in a single pair of contrasting
character is called:
Monohybrid cross Dihybrid cross
Tri-hybrid cross Tetrahybrid cross
The crossing of F1 to any one of the parents is called:
back cross test cross F1 cross all of these
crossing over occurs during:
Pachytene Diplotene Diakinesis Leptotene
Patau's syndrom occurs due to
Trisomy of 13th chromosme Trisomy of 18th chromosome
Trisomy of 21st Chromosome Trisomy f 22nd chromosome.
Plasmid vectors are:
PBR 322 PUC vectors F-factors based vector
All of the above
Which of the following carries the anticodon?
tRNA rRNA mRNA
None of the above
A very important method in plant bnreeding is
Transformation Hybridization
Duplication Heterosis.
(viii) Polyploidy is artificaially induced by:
Colchicine Gibberellin
Auxin Kinin
2. Define mutation? Describe type of mutation and explain anyone of them
in detail.
3. Explain polyploidy, what are the types of polyploidy? How polyploidy can
be useful?
4. Give an account of prophase I of merosis. What is its significance
5. Write shor notes on anytwo of the following:
Pedigree analysis Inborn error of metabolism
ex-situ conservation of germ plasm.
6. Write short notes on any two of the following:
Mean Median Mode Standard deviation.
7. Define interaction of gene. Give one example to prove interaction of gene.
8. Write short notes on anytwo of the following.
Banding technique Plasmid vector
Initation codon and termination codon Chemical mutagens.
9. What is genetic engineering? Explain different application of genetic
engineering for human welfare.
10. What is genetic code? Describe the characteristics of genetic code.