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GCSE Biology · key term
Determining the order of nucleotide bases in a section of DNA.
Used by OCR
Specification B5.2b · Paper 2 (Foundation), Paper 4 (Higher)
Revise: Classification systemsMicroscopes later revealed cellular details, biochemical research allowed proteins and other molecules to be compared, and DNA sequencing made it possible to compare genetic information directly. New evidence can show that an older grouping does not reflect evolutionary relationships, so organisms may be reclassified.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Determining the order of the bases in DNA.
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DNA sequencing determines the order of these bases. Whole-genome sequencing applies this across all the genetic material of an organism rather than examining only one short section or gene.