Over time the stickleback population. . . Question 2 options:

was not changing in the amount of armor they had

was changing to have less armor

was changing to have both large numbers of armored and non-armored individuals.

was changing to have more armor

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.