11Q In a mapping problem, out of 4000 flies, 760 show crossovers between genes A & B, 280 show crossovers between genes B & C. What are the genes represented by A, B and C?
1. javelin, Dichaete, scarlet
2. sepia, hairy, scarlet
3. ebony, rough, Minute bristles
4. roughoid, javelin, hairy
5. None of the above.
CORRECT! The crossover percentages best fit the map distances between roughoid, javelin and hairy.