4. A three-point test involving o2, gl1, and ij gave the following counts:
|o2 + +||467 513||115 150||94 123||28 23||1513|
|+ gl1 ij||980||265||217||51|
The recombination percentages of o2 and ra1 (repulsion phase), also o2 and gl1 indicate that o2 is to the left of v5 and within 2 or 3 units of v5. The percentages between o2 and ij indicate that o2 is 2 or 3 units to the right of v5.
Stock of o2 is available.