Write SQL query to solve given problem: For the pairs of genes with one having 8 chromosomes and the other having 6 chromosomes, what is the highest expression correlation score?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T2.Expression_Corr FROM Genes AS T1 INNER JOIN Interactions AS T2 ON T1.GeneID = T2.GeneID1 WHERE T1.Chromosome = 6 OR T1.Chromosome = 8 ORDER BY T2.Expression_Corr DESC LIMIT 1