If a doctor gives 100 patients who complain of pain a simple sugar pill, he can be sure that 33 of them will feel better. Pain experts have known for a long time that people who respond to placebos also get more relief from narcotics than do those who don't show the 'placebo effect'. Now research is being done to determine whether the placebo response is all in the head or whether the inert pills have physical effects after all.

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)

this transfer is call conjunction

genetic variation will increase because of a new habitat and food source.

explanation:

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.