Final answer:
The egg contributes genetic material, organelles, and building blocks for compounds to the developing embryo.
Step-by-step explanation:
The egg, or oocyte, contributes several important components to the developing embryo. Firstly, the egg provides half of the genetic material in the form of DNA. Additionally, the egg contains organelles, such as mitochondria, which play a crucial role in cellular respiration and energy production. The egg also provides building blocks for compounds like proteins and nucleic acids, along with other necessary materials.