How is a bannana’s dna is shared with 70% of our dna?

Question: How is a bannana's dna is shared with 70% of our dna?
- Keywords:
  DNA,
  gene,
  human,
  plant
Asked by jacobtheman to Keith, Derek on 28 Jun 2013.
- Keith Siew answered on 28 Jun 2013:
  
  Well alot of the proteins and structures that make up our cells are the same irrespective if we are animals or plants… like tubulin and actin which make up the cytoskeleton would be the same… we both need to regulate how our cells divide, etc… so it makes sense that we would have some DNA the same!

Question: How is a bannana's dna is shared with 70% of our dna?