Three genes in fruit flies affect a particular trait, andone dominant allele of each gene is necessary to get awild-type phenotype.a. What phenotypic ratios would you predict amongthe progeny if you crossed triply heterozygous flies?b. You cross a particular wild-type male in successionwith three tester strains. In the cross with one testerstrain (AA bb cc), only 1/4 of the progeny are wildtype. In the crosses involving the other two testerstrains (aa BB cc and aa bb CC), half of the progeny are wild type. What is the genotype of thewild-type male?

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
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Three genes in fruit flies affect a particular trait, and
one dominant allele of each gene is necessary to get a
wild-type phenotype.
a. What phenotypic ratios would you predict among
the progeny if you crossed triply heterozygous flies?
b. You cross a particular wild-type male in succession
with three tester strains. In the cross with one tester
strain (AA bb cc), only 1/4 of the progeny are wild
type. In the crosses involving the other two tester
strains (aa BB cc and aa bb CC), half of the progeny are wild type. What is the genotype of the
wild-type male?

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