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Ahs2201:Genetics And Cytogenetics Question Paper

Ahs2201:Genetics And Cytogenetics

Course:Bachelor Of Horticulture

Institution: Meru University Of Science And Technology question papers

Exam Year:2013

QUESTION ONE – 30 MARKS
a. i. State the hardy-Weinberg law. (3 Marks) ii. Draw a well labelled hardy-Weinberg graph. (6 Marks) iii. What is population genetics? (3 Marks) b. State any three functions of mitosis. (3 Marks) c. What is aneuploidy (1 Mark) d. Give two major importance of accurate genetic location in gene maps (2 Marks) e. What is a chromosome (2 Marks) f. Draw the structure of ribose sugar. (3 Marks) g. Name any three enzymes involved in DNA replication. (3 Marks) h. Differentiate between transcription and translation. (4 Marks)
QUESTION TWO – 20 MARKS
a. Give a detailed description of the mechanism of DNA replication. (12 Marks) b. Draw a well labelled diagram of transfer RNA. (8 Marks)
QUESTION THREE – 20 MARKS
a. What is chromosome aberrations? (2 Marks) b. Give a detailed account of deletion as a source of chromosome aberrations. (4 Marks) c. What is inversion? d. State the two types of inversions. (4 Marks) e. Give a detailed explanation of the various mechanisms of sex determination. (10 Marks)
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QUESTION FOUR – 20 MARKS
a. State and explain all the factors which affect changes in gene frequency in population genetics. (8 Marks) b. Using the genetic code, complete the table below. Assume the reading is from left to right and that the columns represent transcriptional and translational alignments. (12 Marks)
C DNA Double Helix T G A C A U mRNA transcribed G C A Appropriate t RNA anti codon TRP Amino Acid incorporated into protein
QUESTION FIVE – 20 MARKS
a. State the three things which influence the phenotype of a genotype. (3 Marks) b. Explain how you can determine whether an organism is carrying a heterozygous or homozygours genotypes using the progeny test method. (5 Marks) c. Differentiate between incomplete dominance and co-dominance. (4 Marks) d. State any three differences between quantitative and qualitative traits. (6 Marks) e. Differentiate between monosomic and triosomic. (2 Marks)

Ahs2201:Genetics And Cytogenetics Question Paper

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