A factory is built next to a field inhabited by a population of grasshoppers of varying colors preyed upon by sparrows. Over time, the factory's smoke causes the field to turn a darker color. What will most likely happen
to the grasshopper population?
A. The medium-colored grasshoppers will be more likely to survive predation,
B. All of the grasshoppers will stand an equal chance of surviving predation,
C. The grasshoppers better camouflaged by the darker field will survive predation,
D. The lighter-colored grasshoppers will be more likely to survive predation

The answer would be c, white eyes are homozygous recessive. in the early 1900s, morgan conducted several experiments with vinegar  flies (drosophila). one  sample revealed an anomaly: a  white-eyed, single male fly. he attempted to breed this fly with the typical red-eyed females. the offspring were all red-eyed. using flies from this new generation (brother-sister pairs)  produced some red-eyed and a few white-eyed flies. the white-eyed were all male. in later experiments, he was able to produce white-eyed females. this proved that white eyes are not lethal to either sex (ruling out a and b). since the percentage of white eyes to red eyes is so low, white eyes are not a dominant trait. it would be a recessive trait. 

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