BSc Biotechnology Sem II 2016 17 2016-17 Biotech II Lifesciences Genetics Question Paper - Mumbai University | munotes

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1. Q2 All questions carry equal marks
2. Q1 Do as directed:- (any fifteen) 15 marks
   • i. Define gene
   • ii. Define test cross
   • iii. The ratio for dominant epistasis is
   • iv. in humans is an example of multiple alleles Vv. Explain the term Punnett square
   • vi. State True or False: - A homozygous individual could have.a Bb genotype
   • vii. State True or False: - The phenotypic ratio of 1:2:1 in Mirabilis plant is due to incomplete
   • viii. In Mendel's initial experiments, an example of the F2 generation would be
   • a) 75 round seed plants to 25 wrinkled seed plants
   • c) 75 white-flowered plants to 25 purple-flowered plants
   • d) all ofthe above
   • ix. Define Auxotroph
   • x. Define Prophage
   • xi. State True or False: - Ina HFrx cross the frequency of transfer of F factor is low
   • xii. State True or False: - Lambda bacteriophage is normally involved in transduction of the genes for histidine synthesis and ampicillin resistance in bacteria
   • xiii. Give one term for: Fertility factor containing bacterial genes
   • xiv. In bacteria, the entire chromosome can be transferred by the process of induction of lysogenic bacteriophages to lytic cycle Xvi. Define gene flow involves the flow or movement of alleles among the population frequency is calculated by counting the number of individuals with a particular genotype divided by the total number of the individuals in the population
   • xix. Give the full form of PAGE XX, Explain the term: Population Genetics
   • Q.P. Code :03846
   • a) Explain with a suitable example Duplicate recessive epistasis. 08 Illustrate monohybrid cross to elaborate on the principle of dominance and segregation 07 Draw Punnett square for a cross between Rose shaped comb pattern.and Pea Shaped comb 08 pattern to obtain F1 progenies with Walnut shaped comb phenotype. These F1 progenies were selfed to obtain F2 progenies with walnut, rose, pea and single comb shape pattern in fowls What was the phenotype ratio for these four phenotype? Comment on the ratio obtained
   • d) State and Explain the principle of Independent assortment citing a suitable example of adihybrid
   • a) Illustrate life cycle of temperate phages with one example. 08
   • b) Describe the process of transformation and add a note on its significance in mapping 07 Explain the process of progressive genetic transfer and recombination in bacteria by conjugation 08 of HFr & F strains Compare and contrast between generalized and specialized transduction. 07
   • a) Howare the genetic variations determined at DNA level using restriction enzymes? 08 Discuss in detail Genetic Drift. 07 State Hardy-Weinberg's law and Discuss in detail the assumptions of Hardy-Weinberg's law. 08
   • d) How would you compute genotypic and allelic frequencies? 07
3. Q5 Write short notes on any three of the following : 15 marks
   • a) Multiple alleles
   • b) Incomplete dominance
   • c) of F Factor
   • d) selection
   • e) Role of Population genetics in Conservation Biology

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