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Ansc254:Animal Breeding Question Paper

Ansc254:Animal Breeding

Course:Agriculture

Institution: Kenya Methodist University question papers

Exam Year:2012

KENYA METHODIST UNIVERSITY

END OF 2''ND ''TRIMESTER 2012 (DAY) EXAMINATIONS
FACULTY : SCIENCE AND TECHNOLOGY
DEPARTMENT : AGRICULTURE
UNIT CODE : ANSC 254
UNIT TITLE : ANIMAL BREEDING
TIME : 2 HOURS

Instruction:

Answer all the questions in section A and any two in section B.

SECTION A

Question One

Define a gene.

(2mks)

List and explain the forces that change gene frequency in a population.

(10mks)

Question Two
Briefly describe three mating systems pointing out the negatives and positives of each. (12mks)

Question Three
Comment on breeding before medallion period, after discovery of Mendel’s work and the current biotechnology based breeding. (6mks)

SECTION B

Question Four

Our indigenous stock such as Zebu cattle and the small East African goat have largely been ignored by commercial livestock keepers.

What are the reasons for this state of affairs?

(5mks)

Using knowledge gained from this course, design a breeding programme to characterize and improve indigenous Zebu stock.

(15mks)

Question Five

What is heritability? Using appropriate examples explain the role of heritability estimates in animal improvement.

(5mks)

Phenotype =genotype +environment using appropriate examples, explain this statement.

(15mks)

Question Six
Discuss natural and artificial selection processes. Comment on the strength and weaknesses of each. (20mks)

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