So, what if you have both?
“The difference in cerumen type has been tracked to a single base change (a single nucleotide polymorphism) in a gene known as “ATP-binding cassette C11 gene.” In addition to affecting cerumen type, this mutation also reduces sweat production. The researchers conjecture that the reduction in sweat was beneficial to the ancestors of East Asians and Native Americans who are thought to have lived in cold climates.”
http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=117800
Yoshiura K, Kinoshita A, Ishida T, et al. (March 2006). “A SNP in the ABCC11 gene is the determinant of human earwax type”. Nature Genetics 38 (3): 324–30. doi:10.1038/ng1733