Is it true that Prophet Isa is not from the blood line of Adam?

Today I have a discussion with a Christian office colleague. He said that Prophet Isa is not from the blood line of Adam. Because when husband and wife interact with each other then in the result the baby is born. But nobody touches Mariam (A.I), and Prophet Isa born by the power of Allah. So he said, Prophet Isa is not from the blood line of Adam. That's why Christians say that the Prophet Isa is the son of God. My question is: Is it true that Prophet Isa is not from the blood line of Adam?