The diagram shows three varieties, C, D and E, of the same species of insect, and three different leaf patterns, F, G and H, of the same species of plant on which the insect feeds. [Figure 2.1]

1. (a)Suggest which variety of the insect is likely to be found in the greatest numbers in areas where leaf pattern G of the plant is found, and explain your answer. variety of insect explanation[2]
2. (b)Over a period of many years, as they grow, the plants lose the dots and stripes on their leaves which become plain. Suggest and explain what is likely to happen to the numbers of the different varieties of insect in an area where the majority of plants are old.[4]
3. (c)Two alleles, T and t, control the body pattern of the insects. Insects with dots (C) are homozygous dominant. Insects with stripes (E) are homozygous recessive. Plain insects (D) are heterozygous. Explain why all three varieties of insect will continue to be produced even in areas where all the plants have plain leaves.[4]

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