What is theorized that evolution occurred through the use and disuse of physical features- now proven to be a false concept.?

          This idea was originally from Lamarck, a scientist who was studying animal  populations and cheking onto their patterns.

           When you think of Lamarck, it's very easy to see where the problem with this hypothesis is, for example, when a father, that usually goes to the gym, walks every day, has lots of well developed muscles, has a son, is this son going to be strong just like his father when he's born? The answer is, of course not, he needs to go to the gym too right? But be careful, nowadays we have a new thing coming up that is called epigenenics, this is almost as Lamarck described, a fenotype being developed and going to other generations, but it's far more complicated than he had ever imagined it to be.

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)

children tend to take more after their grandparents more than their parents. it’s the dna you received that was passed down to you somewhere in your family. maybe one of your grandparents had/has straight hair and you might have gotten it from them.