DISTANCE EDUCATION
M.Sc. (Botany) DEGREE EXAMINATION, DECEMBER 2017.
CELL BIOLOGY, GENETICS AND PLANT BREEDING
(2008 onwards)
Time Three hours Maximum 100 marks
Answer any FIVE questions.
Each question carries 20 marks.
x 20 100)
1. Write detailed account of the method of breeding for
stress tolerance?
What is mutation breeding? Add notes on its
importance and limitations.
Explain the theories governing hybrid vigour in
plant breeding.
2. How do prions cause diseases?
Write short notes on sex linkage in Drosophila.
Write notes on gene mapping.
Sub. Code
22
DE-2975
2
SP 5
3. Write short notes on gene pool and gene
frequencies.
Discuss different kinds of radiations and chemical
mutagens utilized for induction of mutations.
Giving examples, discuss the evidence suggesting
the role of chloroplast and mitochondria in
cytoplasmic inheritance.
4. Enumerate the transport of ions across the
membrane.
Write notes on protein sorting in mitochondria.
What are the main events of the first mitotic
period?
5. Describe the structure and function of the
microtubule.
Write notes on nuclear transport.
Why can mitochondria be considered the power
plants of the aerobic cells?
6. What are the differences between the prokaryotic
and eukaryotic cells?
What is epistasis? What is the difference between
dominant epistasis and recessive epistasis?
What are the functions of the cytoskeleton?
DE-2975
3
SP 5
7. Write an essay on polyploidy. What role it plays in
plant breeding programme?
Write notes on Hardy-Weinberg Law.
Write notes on protein sorting in chloroplast.
8. What is Golgi complex? What is its biological
function?
Giving example, discuss the principle of
independent assortment.
Explain the selection method available to breed selfpollinated
crops. Add notes on it importance and
limitations.