The scientific document you have studied is adapted from articles in New Scientist and the Journal of Consumer Protection and Food Safety. Use the information from the scientific document and your own knowledge to answer the following questions. Explain how Ted Turlings and colleagues could have identified that the BtPMaT1 gene found in the whitefly was originally a plant gene (paragraph 2). (3) ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................

Biology

IGCSE&ALevel

EDEXCEL

Exam No：wbi15-01-que-20240608 Year：2024 Question No：8(a)

Answer:

An explanation that includes three of the following points:
- determining \{DNA base sequences / genome sequence\} for whitefly (1)
- (data collated) using bioinformatics (1)
- compare \{DNA base sequence / genome\} of whitefly with genomes of plants to see if they are the same (1)
- \{BtPMaT1 sequence / gene\} was only found in plants and not in other species of whitefly (1)

Alternative
- use of PCR (1)
- cut DNA using same restriction enzyme (1)
- use of gel electrophoresis (1)
- show bands from gel electrophoresis of whitefly with genomes of plants are the same (1)

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