Answered: . The production of pigment in the…

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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. The production of pigment in the outer layer of seeds
of corn requires each of the three independently assorting genes A, C, and R to be represented by at least
one dominant allele, as specified in Problem 64. The
dominant allele Pr of a fourth independently assorting
gene is required to convert the biochemical precursor
into a purple pigment, and its recessive allele pr makes
the pigment red. Plants that do not produce pigment
have yellow seeds. Consider a cross of a strain of genotype A/A ; C/C ; R/R ; pr/pr with a strain of genotype
a/a ; c/c ; r/r ; Pr/Pr.
a. What are the phenotypes of the parents?
b. What will be the phenotype of the F1?
c. What phenotypes, and in what proportions, will
appear in the progeny of a selfed F1?
d. What progeny proportions do you predict from the
testcross of an F1?

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