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What color petals would you expect in a pure-breeding (homozygous) plant unable to catalyze the first reaction (white to blue)
White

What color petals would you expect in a pure-breeding plant unable to catalyze the second reaction (blue to purple)
Blue

If the plants in parts a and b are crossed, what color petals will the offspring have?
Purple
Drosophila (fruit-flies) mutants A and B have the same phenotype: the absence of red pigment in the eyes. Homozygous mutants were crossed, and all offspring possessed red eyes.
Does the appearance of red eyes in the progeny indicate complementation or a failure to complement?
Complementation
Drosophila (fruit-flies) mutants A and B have the same phenotype: the absence of red pigment in the eyes. Homozygous mutants were crossed, and all offspring possessed red eyes.
Do the mutants likely have mutations in the same or different genes?
Diffrent Genes