Name an organ which is formed of tissues of two different individuals.
Zygote?
The organ you're referring to is called a "chimeric organ." It is formed when tissues from two genetically distinct individuals are combined to create a single organ. One example of such an organ is a heart, where the tissue from two individuals can be used to reconstruct a functional heart. This is commonly done in heart transplant surgeries.
To find this answer, you can start by understanding the concept of organ transplantation and the different types of transplants that can be performed. Then, further research into specific cases or scientific articles on chimeric organs and heart transplants can provide you with more detailed information.