Achondrogenesis, Type Ii, also known as achondrogenesis type ii, is related to hypochondroplasia and spondyloepiphyseal dysplasia congenita. An important gene associated with Achondrogenesis, Type Ii is COL2A1 (Collagen Type II Alpha 1 Chain), and among its related pathways/superpathways are ERK Signaling and Integrin Pathway. Affiliated tissues include bone and eye, and related phenotypes are short long bone and abnormal bone ossification