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High Flyer Question! 8

Psychology

High Flyer Question! 8. In a species of tree, seed color is determined by four independently assorting genes: A, B, C, and D. The recessive alleles of each of these genes (a, b, c, and d) produce abnormal enzymes that cannot catalyze a reaction in the biosynthetic pathway for seed pigment. If the tree is heterozygous for an enzyme, it will make enough normal enzyme to catalyze the reaction effectively. This pathway is diagrammed as follows: A B C White precursor Yellow Orange Red D Blue When both red and blue pigments are present, the seeds are purple. Trees with the genotypes Aa Bb Cc Dd & Aa Bb Codd were crossed. A) What color are the parental seeds? Aa Bb Cc Dd Aa Bb Cc dd P, P, = B) Determine the relative proportions of White, Yellow, Orange, Red , and Blue seeds from the cross. You should use the rule of multiplication and provide your answers in fractions that have the same denominator. Then you can even provide a phenotypic ratio too! 

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