Of course, a lineage is only as good as the tree entries.
To examine the Y DNA marker attached to Sterling Johnson, go to the DNA tab. It shows:
Y-DNA (paternal line only)
HIDDEN Johnston
I1 from Family Tree DNA
View Detail
(press the hyperlink)
https://www.geni.com/list/dna_to?focus_id=6000000002673042968&dna_test_type=y
A view of the "DNA Tree" shows on the "Tree" tab
The "Profiles" tab shows the link to Private
And there's also a "DNA Ancestor Report" to view
https://www.geni.com/list/ancestors/6000000002673042968?compare_id=6000000041134793265&dna_test_type=y#10
The common ancestor for "hidden" and "Sterling" is highlighted in Green on that report
William Johnston