If a cell has 15% guanine, how much thymine would you expect to be in this cell? 15%
35%
85%
100%

35%

Explanation:

we know that all the guanine pairs with all the cytosine

that means there is also 15% cytosine

100-15-15=70%

this 70% represented by thymine and adenine

all the thymine paris with all the adenine

that means the number of thymine bases is equal to the number of adenine bases

70/2=35%thymine

dwadwadadaddadwadwdwdwad

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)