1.where do most amphibians have to reproduce and why do they reproduce in that particular location?
2.in reproduction, do frogs have internal or external fertilization?
3.what is metamorphosis?
4.besides the use of gills and lungs, how else can amphibians obtain oxygen?
5.what type of symmetry do frogs display?
6.how do we know when it is mating or breeding season for frogs?

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.