Answered: An organism of the genotype AaBbCc was…

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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An organism of the genotype AaBbCc was testcrossed to a triply
recessive organism (aabbcc). The genotypes of the progeny are
presented in the following table.
20 AaBbCc 20 AaBbcc
20 aabbCc 20 aabbcc
5 AabbCc 5 Aabbcc
5 aaBbCc 5 aaBbcc
(a) If these three genes were all assorting independently, how
many genotypic and phenotypic classes would result in the offspring,
and in what proportion, assuming simple dominance and
recessiveness in each gene pair?
(b) Answer part (a) again, assuming the three genes are so tightly
linked on a single chromosome that no crossover gametes were
recovered in the sample of offspring.
(c) What can you conclude from the actual data about the location
of the three genes in relation to one another?

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