Solutions for Chapter 25
Choose the statement that best explains how the Tbx5 protein can be responsible for the development of arms in humans and wings in birds.
a. Tbx5 is a key component of bone.
b. Tbx5 is a transcription factor that binds to the promoters of different genes in humans and birds to initiate arm and wing development.
c. Tbx5 was co-opted from its role in tail development for the role in limb development.
d. Tbx5 is a signaling molecule involved in the signaling pathway for limb development in both species.