Which of the following can be used to study developmental pathways? 1)Identifying genes whose products are involved in the differentiation of specific phenotypes 2)Identifying genes whose products are involved in the dedifferentiation of genotypes 3)Identifying proteins whose products are not involved in the differentiation of specific phenotypes
A) 1 B) 2 C) 3 D) 1 and 3 E) All of these are correct.