What is the genotype ratio of the F2 plants?

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?

About __ of the mass of the cell is water

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.