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Posted By: SajithkumarS Member Level: Diamond Posted Date: 19 Jan 2008
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2001 Mohan lala Sukadia University ZOOLOGY - Third Paper- Heredity and Genetics Question paper
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1
Second Year Examination of the
Three Year Degree Course, 2001
ZOOLOGY
Third Paper
(Heredity and Genetics)
Time : 3 Hours
[ Maximum Marks :50]
Attempt any five questions,
selecting at least one question from each unit,
All questions carry equal marks.
UNIT – I
1. Describe structure of Chromosome:
(a) when observed under light microscope
(b) when observed under electron microscope.
OR
2. Describe these stages of cell cycle :
(a) Initial growth period
(b) Second growth period.
UNIT-II
3. Giving suitable example, describe sex-linked
inheritance in drosophila.
4. Differentiate between :
(a) Sex limited gene and sex influenced gene.
(b) Complete sex linkage and incomplete sex linkage.
UNIT-III
5. Draw following diagram of various stages of meiosis
showing situation of chromosomes:
(a) Pachytene
(b) Diplotene
(c) First metaphase
(d) First anaphase
(e) Second metaphase
(f) First telophase
6. Write notes on :
(a) Down syndrome
(b) Klinfelter's syndrome
(c) Turner's syndrome
UNIT-IV
7. What do you understand by gene mutation?
Differentiate between somatic and germ mutations.
8. What do you understand by chromosomal mutation?
Differentiate between chromosomal number and
chromosomal aberrations.
UNIT-V
9. What do you understand by genetic engineering?
Describe various steps of formation of recombinant DNA.
10. Explain :
(a) Triplet
(b) Chain initiation codon
(c) Chain termination codon
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