Genetics and Plant Breeding I (Principles of Genetics and Cytogenetics)

Daffodil International University Department of Agricultural Science Faculty of Agricultural Sciences B.Sc. in Agricultural Science Midterm Examination-Summer 2026 Course Code: 0819 2201 Course Title: Genetics and Plant Breeding -I (Principles of Genetics and Cytogenetics) Level and Term: L-2, T-2 Section: 251 (A & B) Course Teacher Initials: MAS & MAR Time: 1 Hr 30 minutes Total Marks: 25 Splitting any answer is strictly prohibited 1 (a) Define euchromatin and heterochromatin. Enumerate their important characteristics (PLO1,CLO1,C1) 2 (b) Draw and leble the typical structure of a somatic chromosome at the metaphase stage. (PLO1,CLO1,C2) 3 2 (a) Briefly describe the polytene chromosome with functions. (PLO1,CLO1, C1) 3 (b) Contrast between the centromere and nucleolar organizer region. (PLO1,CLO1,C2) 2 3 (a) Differentiate the roles of different types of RNA in protein synthesis (PLO2,CLO1,C4) 3 (b) What is the importance of the hydrogen bonds in DNA structure? (PLO2,CLO1,C4) 2 4 (a) Compare and contrast the different models of DNA replication. (PLO2,CLO1,C3) 3 (b) Describe the characteristics of cpDNA and show how they are useful in plant studies. (PLO2,CLO1,C3) 2 5 (a) How do DNA packaged into chromosome? (PLO1,CLO2,C3) 3 (b) Analyze the consequences of errors in DNA replication on an organism. (PLO1,CLO2, C3) 2