Suppose a geneticist uses a three-point testcross to map three linked Drosophila recessive mutations called f, z, and b. Gene fis associated with abnormally fast movement, z is associated with a zigzag movement pattern, and b is associated with broad wings. The geneticist first crosses homozygous broad flies to homozygous fast, zigzag flies. Next, he testcrosses the F1 progeny to fast, zigzag, broad parents and obtains the results reported in the table.
Suppose a geneticist uses a three-point testcross to map three linked Drosophila recessive mutations called f, z, and b. Gene fis associated with abnormally fast movement, z is associated with a zigzag movement pattern, and b is associated with broad wings. The geneticist first crosses homozygous broad flies to homozygous fast, zigzag flies. Next, he testcrosses the F1 progeny to fast, zigzag, broad parents and obtains the results reported in the table.
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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Please help and explain

Transcribed Image Text:Suppose a geneticist uses a three-point testcross to map three
linked Drosophila recessive mutations called f, z, and b. Gene
fis associated with abnormally fast movement, z is associated
F Testcross Progeny Phenotype
Number
broad
609
fast, zigzag
603
with a zigzag movement pattern, and b is associated with
broad wings.
zigzag
237
fast, broad
231
The geneticist first crosses homozygous broad flies to
homozygous fast, zigzag flies. Next, he testcrosses the F1
fast
231
progeny to fast, zigzag, broad parents and obtains the results
zigzag, broad
233
reported in the table.
fast, zigzag, broad
8.
wild type
9
Based on the data, select the order of the three genes.
O bfz
O bzf
Ofzb
O zfb
O zbf
Ofbz
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