In this chapter, we have focused on large-scale as well as the inter- and intracellular events that take place during embryogenesis and the formation of adult structures. In particular, we discussed how the adult body plan is laid down by a cascade of gene expression, and the role of cell–cell communication in development. Based on your knowledge of these topics, answer several fundamental questions:

How do we know that eye formation in all animals is controlled by a binary switch gene?

Video transcript

Hello, everyone. Here we have a question asking what is the most likely result of a mutation in the binary switch gene? Most likely outcome if a mutation occurs in the binary switch gene that controls I formation. And animals would depend on the specific mutation and its impact on the function of the gene. But one possibility is the absence of eyes. So our answer here is a, the animal will not develop eyes. Thank you for watching. Bye.