NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF AGRICULTURAL SCIENCE
JANUARY/FEBRUARY 2013 EXAMINATION

ANP 310                     GENETICS AND BREEDING (2 Credit Units)

ANSWER ANY 4 QUESTIONS (25 Marks each)

TIME:                                     2HOURS

1a. Cell is made up of different components name them.

1b.Write short note on any three of the following cell components:

Lysosomes

Cytoplasm

Reticulum

Microtubule

Nucleus

2a. Which component of the cell is referred to as the “Power house” of the cell and why?

2b. What are the chemical composition of chloroplasts.

2c. What are the function of inorganic salts? Give examples of five inorganic salts found in the cell.

3a. What is nucleic acid?

3b.Name the three types of RNA found in the cells and their percentage composition.

4a. Define the term mitosis and meiosis. Where can one study meiosis in plants

4b. What is the significance of mitosis?

5a. According to Mendel what are the three basic law of inheritance?

5b. Briefly explain the law of dominance and the law of segregation.

5c. Define test cross, back cross and mutation.

5d. Briefly explain the following terms:

       PLEIOTROPISM

       COMPLIMENTARY GENE

        EPISTASIS

6a. Define pollination and what are the different methods used in breeding self-pollinated plants?

6b. What are the aims of animal improvement programs?

6c. What are the benefits of Artificial insemination?