Regarding selecting embryos: in nature, the fittest embryos are put up to the test. Those that are fertile and fit enough make it. Others don't and die. We can work with this process and make fertile embryos by choice. We may be by nature of life be unable to produce something that shouldn't live. However, to pursue this life with kindness and love for it and all things is what is right and love. The body is unimportant. The planet and loving God are important. No special body will ever replace man's need for God, nor will we be able to shift the fundamental challenges of life without God.
We are in a closed set existance. There is no way to leave it, and we can only change it from the inside. God is the Alpha and Omega. If I make anything in earnest pursuing God's glorification, and God is the first and last thing I think of when I make it, I believe it has righteousness in it.