Answered: In fruit flies, you are studying three…

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 fruit flies, you are studying three genes, whose recessive alleles can generate interesting traits. The abnormal traits are “short” – gene s, “ruby-eyed” – gene r, and “ebony body” – gene e. You have been provided an F1 population of flies that are heterozygous at all three of these gene and you testcross these flies by “ssrree” flies. The attached image lists any recessive traits displayed by the flies, unlisted traits are wild type.

a) the genotype of the parental flies used to make the F1 population,

b) determine if any of these three genes are located on the same chromosome or are unlinked,

c) if possible, correct your data for double crossover events evidenced in the ratios,

398
short
72
ebony, short
67
ruby eyed
44
ebony
35
ruby eyed, short
9
wild type
5
ebony, ruby eyed, short
370
ebony, ruby eyed

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