What are the similarities and differences between, say, the DNA of yeast and the DNS of humans?

Question: What are the similarities and differences between, say, the DNA of yeast and the DNS of humans?

Asked by happybirthdayjulia to Chris, Kay, Kerstin, Lorna, Liv on 22 Mar 2010 in Categories: General.
- Kerstin Zechner answered on 22 Mar 2010:
  
  Structurally, all DNA is the same in all organisms. A lot of genes will be the same between humans and yeast, as they will code for genes important for basic cellular processes. It’s believed that about 20% of human genes linked to diseases have counterparts in yeast.
- Olivia Hibbitt answered on 23 Mar 2010:
  
  Hey julia,
  
  there are lots of differences and similarities between the genomes of all life on earth!! The one over riding similarity is that they are all made up of the same nucleotides!

happybirthdayjulia commented on 22 Mar 2010:

Thanks, I wouldn’t have expected they would be that similar.
Kerstin commented on 22 Mar 2010:

No worries, let me know if you want to know more 🙂
happybirthdayjulia commented on 24 Mar 2010:

Thanks Kerstin and Olivia – but what exactly are nucleotides?

Question: What are the similarities and differences between, say, the DNA of yeast and the DNS of humans?