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 Agricultural Science Paper 2, May/June 2008
 Questions: 1 2 3 4 5 6 7 8 9 10 Main
Weakness/Remedies
Strength

Question 6

(a )Define crop improvement

(b) Copy and complete the table below based on Mendel's Law of Independent Assortment of Genes (Dihybrid inheritance).

 TC Tc Tc Tc TC TTCC Tc TTcc STc ttCc Tc ttcC

Use the following information:

T = Tall;

C=Coloure

t = Dwarf

c = White.

( Where T and C dominant characters; while t and c are reccessive characters) [6 marks]

(c) Calculate the percentage of plants in 6(b) above that are:

(i) Tall coloured;

(ii) Tall white;

(iii) Dwarf coloured;

(iv) Dwarf white.

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OBSERVATION
This question was well attempted by the candidates. In question 6(a), majority of the candidates could define crop improvement. Also in questions 6(b) and (c), most of the candidates were able to complete the table and calculate the percentage of plants that are Tall coloured; Tall white; Dwarf coloured and Dwarf white.