Final answer:
If Daniel's partner (the mother) is a carrier of the red-green colorblindness trait, there is a 50% chance that their daughter will be a carrier as well, but not affected by colorblindness.
Step-by-step explanation:
In this scenario, the mother is a carrier of the red-green colorblindness trait, which is inherited as a recessive X-linked trait. The father, on the other hand, does not possess the trait.
As a result, there is a 50% chance that their son will be colorblind.
When it comes to the daughter, she will not be affected by colorblindness, but she will have a 50% chance of being a carrier like her mother. This means that she will possess the colorblindness trait but will not express it.