Final answer:
If an Arabidopsis plant does not express homeotic genes during flower development, it will develop leaves instead of flowers.
Step-by-step explanation:
If an Arabidopsis plant does not express homeotic genes during flower development, the plant will develop leaves instead of flowers. Homeotic genes play a crucial role in determining the identity and development of floral organs, and their absence can lead to a change in organ formation. For example, in Arabidopsis, the absence of homeotic gene expression can result in the transformation of flower organs into leaf-like structures. This demonstrates the importance of homeotic genes in flower development and organ identity.