For Dyson, the "ultimate danger" is the use of genetic engineering in human embryos. He supports this information by showing how it changes human nature.
For Dyson, the use of genetic engineering in human embryos is very dangerous, as it modifies what is natural and does not foresee the damage and negative consequences that this can cause in the long and short term.
More information about genetic engineering is at the link:
https://brainly.com/question/13491558