Zander made his full international debut in Scotland's opening game of the Six Nations Championship against England, where he replaced WP Nel in the 69th minute.
Zander is joined by Glasgow's Stage 3 Academy players Scott Cummings, Matt Smith, Andrew Davidson and Callum Hunter-Hill.
Scotland U20
15 Ruairi Howarth (Gala)
14 Ben Robbins (Currie)
13 Rory Hutchinson (Northampton Saints)
12 Tom Galbraith (Melrose)
11 Darcy Graham (Hawick)
10 Adam Hastings (Bath Rugby)
9 Hugh Fraser (Heriot's)
1 Murray McCallum (Heriot's)
2 Jake Kerr (Boroughmuir)
3 Zander Fagerson (Glasgow Warriors)
4 Callum Hunter-Hill (Stirling County)
5 Scott Cummings CAPTAIN (Glasgow Hawks)
6 Andrew Davidson (Glasgow Hawks)
7 Matt Smith (Glasgow Hawks)
8 Ally Miller (Melrose)
Substitutes
16 Lewis Anderson (Ayr)
17 George Thornton (Bishop Burton College)
18 Callum Sheldon (Leeds Beckett University)
19 Stephen Ainslie (Currie)
20 Scott Burnside (Boroughmuir)
21 Ruaridh Dawson (Newcastle Falcons)
22 George Taylor (Melrose)
23 Robbie Nairn (Harlequins)