Question: The very simple genotype-phenotype relationship of dominance, codominance and recessiveness has been complicated by issues of penetrance and epistatsis. Thousands of simple single gene disorders have been described in various human populations. Now we are interested in identifying the gene(s) responsible for complex phenotypes such as eye color and intelligence. The two approaches to this problem are known as
a. the candidate gene and genome wide association studies. b. the multiple allele and the linkage approaches. c. the Rayleigh and Strassburger approaches. d. the c2 and Duarte conjunctions. e. crossover and recombination mapping studies.