1. Print the protein tree with the stable id ENSGT00390000003602.
2. Print all the members of the tree containing the human ncRNA gene ENSG00000238344.
3. Count the number of duplication events in the tree of the zebrafish protein-coding gene ENSDARG00000003399
Matthieu explains the answers to these questions in this 6 min video. You can download his sample scripts and outputs: