Seven cups of instant coffee contain 315 mg of caffeine. How much caffeine is there in one cup of instant coffee?

45 mg of caffeine in one cup of instant coffee.

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)

as many times as you want