gene D enzyme, anthocyanin gene B white enzyme blue intermediate intermediate (purple) What color netals would You Pynect in nure

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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. In a certain plant, the flower petals are normally purple.
Two recessive mutations arise in separate plants and are
found to be on different chromosomes. Mutation 1 (m1)
gives blue petals when homozygous (m1/m1). Mutation
2 (m2) gives red petals when homozygous (m2/m2).
Biochemists working on the synthesis of flower pigments in this species have already described the following pathway:
colorless (white)
compound
blue pigment
red pigment
enzyme A
enzyme B
a. Which mutant would you expect to be deficient in
enzyme A activity?
b. A plant has the genotype M1/m1 ; M2/m2. What
would you expect its phenotype to be?
c. If the plant in part b is selfed, what colors of progeny
would you expect and in what proportions?
d. Why are these mutants recessive?

gene D
enzyme, anthocyanin
gene B
white
enzyme
blue
intermediate
intermediate
(purple)
What color netals would You
Pynect in
nure
Transcribed Image Text:gene D enzyme, anthocyanin gene B white enzyme blue intermediate intermediate (purple) What color netals would You Pynect in nure
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