BSc Zoology Sem III 2018 2019 2019 Zoology I Question Paper - Mumbai University | munotes

Questions asked in this paper

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• 2. Figures to the right indicate full marks

1. Q3 Draw neat and labeled diagrams wherever necessary
2. Q1 A the blanks by choosing the correct option given in the 5 marks
   • i. 18 the smallest unit of genetic material which when changed or mutated produces a change in the phenotype
   • ii. The name, chromosome was given by ili. Holandric genes are present in (only females, only males, males and females)
   • iv. molecule that is bound to clusters of ribosomes constitutes
   • v. Capping of RNA is carried out by addition of a methylated guanosine base to the . of the RNA (5’ end, 3’ end , middle) B Match column I with column IJ and rewrite : 05
   • C. Mention whether the following statements are ‘True’ or ‘False’: 05
   • i. A recessive trait is a phenotype that is not expressed in a heterozygous il. In metacentric chromosome the centromere is located almost near to any one of its end ili. Disorders such as hemophilia and colour blindness are controlled by
   • iv. In the lac operon of E.coli, lactose functions as an inducer
   • v. Heterochromatin is transcriptionally inactive
   • D. Answer in one or two sentences only : 10
   • i. Define phenotype li. Define allele ili. What is an ideogram?
   • iv. How is the termination of transcription different in prokaryotes and
   • v. Define a Gynandromorph
3. Q2 A Answer any one of the following : 10 marks
   • i. Give an account on “Modern concept of gene”. Explain polygenic inheritance in man
   • ii. With appropriate illustrations explain dihybrid cross. Add a note on law of independent assortment
   • B. Answer any two of the following: 10
   • i. Differentiate between incomplete dominance and co-dominance
   • ii. Discuss with appropriate chart, pedigree analysis of autosomal Explain ABO blood groups in man
   • iv. Write a brief note on factors affecting crossing over
4. Q3 A. Answer any one of the following: 10 marks
5. Q1 Explain the structure of eukaryotic chromosome Explain sex determination in Drosophila
   • B. Answer any two of the following: 10
   • i. Briefly describe haplodiploidy Explain briefly parthenogenesis ili. Describe sex determination in crocodile
   • iv. Describe the phenomenon of ‘Freemartin’
6. Q4 A. Answer any one of the following: 10 marks
   • i. With the help of labeled diagram, describe the structure of t-RNA Add a note on its function li. What is genetic code? Explain in detail the properties of genetic code
   • B. Answer any two of the following: 10
   • i. Explain the role of various enzymes involved in eukaryotic DNA
   • ii. Describe the A and B forms of DNA Give an account of DNA present in prokaryotes
   • iv. Describe the process of elongation in polypeptide synthesis
7. Q5 Write short note on any four of the following : 20 marks
   • i. Lethal alleles, X-chromosome in humans,
   • v. Concept of operon,
   • vi. Role of RNA polymerases in eukaryotic transcription

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