Order sample extraction, amplification and fragment separation, then compare bands at matching positions and qualify the conclusion using similarities and differences.
Madagascar is a large island off the southeast coast of mainland Africa.
Lemurs are endemic to Madagascar.
Lemurs have been found on another island close to Madagascar.
Scientists have used DNA profiling to show that these lemurs originated from those on Madagascar.
Explain how DNA profiling could show that these lemurs originated from the lemurs on Madagascar.
An explanation that includes two of the following points:
- gel electrophoresis run on DNA from both groups of lemurs (1)
- pattern of bands were similar showing the lemurs were genetically similar (1)
- base sequencing would show similar sequences (1)
ACCEPT use of bioinformatics to show that the base sequences were similar
(2)