The placenta is
a. the tube through which a developing baby receives nourishment
b. the technical name for the "belly button"
c. a specialized organ that provides nourishment and filters away waste products from the developing baby
d. the name for the developing organism until it is 8 weeks old
e. the name for the developing organism after it is 8 weeks old

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. 

Where is the data? ? and graph