Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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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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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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