The cross a+a+ b+b+ x aa bb produces an F1 that is phenotypically a+ b+. Its F2 phenotypes appear in the following numbers:
a+ b+ 110
a+ b 16
a b+ 19
a b 15
Total 160
What F2 numbers would be expected if the a and b loci assort independently? Use a chi-square test to evaluate whether the two loci are linked or assort independently.