Question: Which signal-transduction pathways are involved and responsible for most of embryonic development?
Answer: the wingless related (Wnt) pathway; Transforming Growth Factor-Î˛ (TGF-Î˛) pathway; Hedgehog (Hh) pathway; Receptor Tyrosine Kinase (RTK) pathway; Janus kinase (JAK)/signal transducer and activator of transcription (STAT) pathway; Notch pathway; nuclear receptor pathway