A GM plum tree contains an inserted allele that delays fruit ripening. Related wild plum trees grow outside the orchard. Scientists collect evidence after both types of plum tree have flowered.
Which result provides the strongest evidence that the inserted allele has passed from the GM plum trees to the wild plum population through pollination?
The inserted allele is detected in young wild plum plants grown from seeds collected outside the orchard.
Pollen from the wild plum trees is detected on flowers of GM plum trees.
The inserted allele is detected in pollen collected from GM plum trees inside the orchard.
Fruit from the GM plum trees ripens later than fruit from the wild plum trees.
100 exam-style questions on Edexcel GCSE Biology 4.3 Selective breeding and genetic modification, covering 4.3.1 Selective breeding and its impact, 4.3.2 Tissue culture, 4.3.3 Genetic engineering overview, 4.3.4 Main stages of genetic engineering, 4.3.5 Advantages and disadvantages of GM organisms, 4.3.6 Agricultural solutions for a growing population, and 4.3.7 Evaluating genetic engineering and breeding. Each one has a worked solution and a mark scheme showing where the marks go.