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In maize, the gene for purple colour is dominant to the gene for white colour. A pure breeding maize plant with purple grains was crossed with heterozygous plant.
(a) (i) Using letter G to represent the gene for purple colour, work out the genotype ratio of the offspring.
(ii) State the phenotype of the offspring.
(b) What is genetic engineering?
(c) What is meant by hybrid vigour?