BSc Zoology Sem III ATKT ZOOLOGY PAPER 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) Fill in the blanks by choosing the correct option given in the brackets: 5 marks
   • i) The criss-cross pattern is observed in inheritance li) chromosome was first discovered by Walther Fleming ili) The part of DNA specifying a single polypeptide chain is termed as
   • iv) Avery’s experiments demonstrated that molecule is responsible for
   • v) _ codon signals the end of the protein or polypeptide chain
3. Q1 B) Match the Column I and Column II and rewrite: 5 marks
4. Q1 C) Mention whether the given statements are True or False: 5 marks
   • i) There are 46 pairs of chromosomes in humans
   • ii) XX-XO mechanism of sex determination is observed in grasshoppers Antibodies present in the serum of a person with blood group A will agglutinate the RBCs of any other group
   • iv) The H-DNA is a triplex consisting of three strands
   • v) Beadle and Tatum proposed the one gene-one enzyme hypothesis
5. Q1 D) Answer in one or two sentences only: 5 marks
6. Q1 Define karyotype
   • ii) Define the term ‘intersex’ Define back cross
   • iv) What is.a wild type allele?
   • v) Define the terms ‘codon’ and ‘anticodon’
7. Q2 A) Answer any one of the following: 10 marks
8. Q1 Give a detailed account of multiple alleles and explain with respect to coat colour in Define epistasis. Explain double dominant epistasis
9. Q2 B) Answer any two of the following: 10 marks
10. Q1 Explain classical concept of gene
    • ii) Describe inheritance of lethal alleles ili) Briefly discuss polygenic inheritance
    • iv) Explain briefly complete linkage
11. Q3 A) Answer any one of the following: 10 marks
12. Q1 Classify chromosomes based on the position of the centromere
    • ii) Explain the pattern of inheritance of colour blindness in man
13. Q3 B) Answer any two of the following: 10 marks
14. Q1 Briefly describe the polytene chromosomes Explain the phenomenon of parthenogenesis ili) Write a explanatory note on autosomes
    • iv) Discuss the role of environmental factors in sex determination Answer any one of the following: 10
    • i) Explain the statement “DNA replication is bidirectional in nature and continuous in one strand and discontinuous in another.” 1i) Give an account of the structure and functions of different types of RNA
15. Q4 B) Answer any two of the following: 10 marks
16. Q1 Describe in brief the salient features of double helical structure of DNA Give a brief account of the different types of extranuclear DNA Describe the process of termination of polypeptide synthesis
    • iv) Discuss the Griffith transformation experiments Write short note on any four: 20
17. Q1 Monohybrid cross
    • ii) Types of crossing over 111) mechanism of sex determination
    • v) RNA as a genetic material
    • vi) Regulation of lac operon

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