Scientists using RNA hybridization techniques found that a transcription factor called macho-1 localized to some cells during early cleavage,but not others.Descendents of these cells produce mesodermal derivatives.Which structures might not be found in embryos depleted of macho-1?
A)neural tube
B)somites
C)digestive system
D)skin

Question

Quizplus · Accepted Answer

Macho-1 localized to cells that give rise to mesodermal derivatives. Somites, which are mesodermal structures, are likely to be affected in embryos that are depleted of macho-1. The neural tube and digestive system are derived from different germ layers and are unlikely to be affected by macho-1 depletion. Similarly, the skin is also derived from a different layer and is unlikely to be affected. Hence, the best choice is B) somites.

Scientists Using RNA Hybridization Techniques Found That a Transcription Factor