Problem:
You hypothesize there may be a loss-of-function mutation in an intracellular component of the skin signaling pathway. Which of the following if present would best support your hypothesis now? Note: You may only take into consideration all the components described in the stem cell (4-oval) diagram, original experimental results 1-5 shown above, and the graph showing high neural DIFF relative expression. Do not consider any yet-to-be-discovered components.
1. The SR receptor is present
2. ID genes are not expressed
3. Transcription factor of the neural pathway is in the nucleus
4. Neural pathway receptor is phosphorylated
5. Skin pathway transducer 1 is phosphorylated Group of answer choices Neural signal only Skin signal only Skin and neural signals SR signal only