GENETICS-supply2k9

Code No: 43112 Set No. 1
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
GENETICS
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. What is law of segregation? Elucidate with respect to Tall and short nature of
plants. [16]
2. What is circular DNA? Explain its importance and occurrence. [16]
3. Describe the lysozenic pathway, bacteriophages and their uses in transduction ex-
periments? [16]
4. How the gene mapping is done with microbial eukaryotes? Explain with an example
of yeast. [16]
5. Explain the salient features involved in the identification of human chromosomes
in making a karyotype. [16]
6. How do you explain the inheritance of white-eye color and lethality in drosophila
with attached X chromosomes? [16]
7. What is sex influenced Dominance? Discuss its role in relation to male and female
hormones? [16]
8. Explain the differences between Mendelian and extra chromosomal inheritance.
[16]
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Code No: 43112 Set No. 2
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
GENETICS
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. Describe Multiple alleles with a suitable example. [16]
2. How DNA is organized? Explain elaborately. [16]
3. What are the different stages of transformation? Explain the molecular mechanism
involved. [16]
4. How the mapping of genes can be carried out with tetrad analysis? Explain. [16]
5. Describe the cytological and genetic detection of translocations and what are their
consequences. [16]
6. What are sex chromosomes? How do organisms compensate for different number of
X chromosomes in the two sexes in homogametic males and homogametic females?
[16]
7. Discuss on Y chromosome and Sex determination in mammals with examples of
genes related to Y-chromosomes? [16]
8. Explain the possible origin of chloroplast and mitochondrial genome. [16]
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Code No: 43112 Set No. 3
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
GENETICS
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. What is interaction? Describe the genetic interaction of taking an example of hen
comb. [16]
2. Describe the inverted repeats and secondary structure in single stranded nucleic
acid. [16]
3. What is the mechanism of bacterial conjugation? Explain. [16]
4. Describe the mapping of genes with molecular markers. [16]
5. Explain the aetiology of uniparental disomy with an example. [16]
6. How do hormones play their role in sex differentiation and development of secondary
sex characters? Give examples of some traits? [16]
7. Explain the mechanism of sex determination in humans? Elaborate on Homoga-
metic females and heterogametic males in humans? [16]
8. What is the phenotype of petite mutants and discuss the difference between neutral
and suppressive petites. [16]
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Code No: 43112 Set No. 4
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
GENETICS
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. What are different types of Linkage? Explain in detail with a drosophila example.
[16]
2. Describe the replication of DNA in Eukaryotic organisms. [16]
3. Write an essay on Leiderberg experiments on Bacterial conjugation. [16]
4. Construct the linkage map for an X chromosome of Drosophila with illustrations.
[16]
5. Explain the aetiology of uniparental disomy with an example. [16]
6. Define the terms :
(a) Autosomes.
(b) Sex chromosomes
(c) Hemizygous
(d) Homozygous. [4×4]
7. Define Sex chromosomes? What kind of sex linked genes have been identified in
humans? [16]
8. Discuss the similarities and dissimilarities between nuclear inheritance and cyto-
plasmic inheritance. Illustrate your answer with examples. [16]
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GENETICS-supply 2009

Code No: RR212306 Set No. 1
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
GENETICS
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. (a) Describe law of segregation
(b) law of independent assortment. [8+8]
2. What is the evidence that the genetic material of TMV {TobaccoMosiacV irus} is
RNA [6+10]
3. What two essential criteria must be met in order to execute a successful mapping
cross? [8+8]
4. Describe the conjugation process in F+ and F− bacteria. [8+8]
5. Draw and label the detail structure of metaphase chromosome. Write types of
chromosome found in human. [8+8]
6. Most mutations in a diploid organism are recessive. Why? [5+11]
7. Write the mechanism of sex determination in plants. [8+8]
8. A dextral snail is self fertilized and produces only sinistral progeny. What is the
probable genotype of this snail and its parents? [8+8]
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Code No: RR212306 Set No. 2
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
GENETICS
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. What properties of Fruit Flies and made them the organism of choice for genetics?
[5+11]
2. What is the difference in genetic material distribution in prokaryotic and eukaryotic
cells. Explain it’s consequences. [8+8]
3. Explain the experimental proof which forms the cytological basis of crossing over.
[8+8]
4. Distinguish among the three modes of recombination in bacteria. [5+5+6]
5. What are deletions? Illustrate your answer with suitable examples. [4+12]
6. What is replica plating? Comment on its significance. [6+10]
7. Why do we believe that humans with aneuploid karyotypes occur but are usually
inviable? [4+12]
8. What is kappa in Paramecium? [4+12]
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Code No: RR212306 Set No. 3
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
GENETICS
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. Distinguish between epistatis and polygenetic inheritance. [8+8]
2. The function ascribed to the genetic material are replication, expression, storage,
and mutation. What does each of these terms mean? [4×4]
3. What is the relationship between recombination frequency and genetic distance?
[8+8]
4. Describe in brief:
(a) Transduction
(b) Transformation. [8+8]
5. Give a concise account of numerical aberrations of human chromosomes. [6+10]
6. What is meant by a conditional lethal mutation? [4+12]
7. Define lyon hypothesis. [3+13]
8. A dextral snail is self fertilized and produces only sinistral progeny. What is the
probable genotype of this snail and its parents? [8+8]
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Code No: RR212306 Set No. 4
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
GENETICS
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. Define the terms:
(a) F1 generation
(b) backcross
(c) testcross
(d) pleotropism
(e) epistasis
(f) multiple factor inheritance
(g) give the genotypic ratios of a trihybrid cross using Fork method
(h) criss cross inheritance. [2+2+2+2+3+2+3]
2. Elaborate on the various contributions made in understanding transformation by
Griffith, Avery and his co-workers. [4+12]
3. Describe the mechanism of crossing over? [6+10]
4. Describe the basis for chromosome mapping in the Hfr x F- crosses. [4+12]
5. Give the gametic complement, in term of acentric, dicentric, duplication and defi-
ciencies. [4×4]
6. Describe tautomerism and the way in which theis chemical event may lead to mu-
tation. [3+13]
7. Contrast the evidence leading to the explanation of the different modes of sex
determination in Drosophila and humans. [8+8]
8. State on criteria of non mendelian inheritance. [4+12]
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