The transition from one region of the vertebral column to another is
A) an example of heterochrony.
B) under the temporal control of the Hox6 gene expression.
C) controlled by the pattern of Hox6 gene expression.
D) an example of modularity in development.
E) explains why giraffes' necks are longer than that of humans.

Question

Quizplus · Accepted Answer

The pattern of Hox gene expression controls the transition between regions of the vertebral column, with specific Hox genes being expressed in specific regions. In particular, the Hox6 gene is important in distinguishing between the cervical and thoracic regions of the spine.

The Transition from One Region of the Vertebral Column to Another