A student studying photosynthesis uses a toothpick to collect pigment from a leaf She spreads the pigment on to a strip of filter paper and drop it
into a chamber containing a solvent. As the solvent migrates up the filter
paper, the pigments from the leaf are carried up the paper with the
solvent. This process is called chromatography. The students results from
her chromatography experiment are in the image. What can the student
conclude based on the results.
Kiki

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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