CREATE TABLE table_54521 ("Species" TEXT, "Strain" TEXT, "Type" TEXT, "Base Pairs" FLOAT, "Genes" FLOAT)

What is the average number of base pairs with 784 genes?
SELECT AVG("Base Pairs") FROM table_54521 WHERE "Genes" = '784'
SELECT AVG("Base Pairs") FROM "table_54521" WHERE "Genes" = '784'