In some plants a red pigment , cyandin, is synthesized from a colorless precursor. The addition of (-OH) to the cyandin molecule causes it to become purple. In a cross between two randomly selected purple plants, the following results were obtained
94 purple
31 red
43 white

Question

In some plants a red pigment , cyandin, is synthesized from a colorless precursor. The addition of (-OH) to the cyandin molecule causes it to become purple. In a cross between two randomly selected purple plants, the following results were obtained
94 purple
31 red
43 white

anonymous · Answer

which genotypic combinations produce which phenotype?
PP=purple
Pr=red
Rr=white

what are the genotypes of the plants in the purplex purple cross?
PrxPr --> PP,Pr,rr

suggest a mechanism for the production of color?
colorless if there are r enzymes red if there are p enzymes and purple, epistasis

praetorian.10 · Answer

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