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Campbell Biology | 10th Edition | ISBN: 9780321775658 | Authors: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
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A wild-type fruit fly (heterozygous for gray body color andred eyes) is mated with a

Chapter 15, Problem 6

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QUESTION:

A wild-type fruit fly (heterozygous for gray body color andred eyes) is mated with a black fruit fly with purple eyes. Theoffspring are wild-type, 721; black-purple, 751; gray-purple, 49;black-red, 45. What is the recombination frequency betweenthese genes for body color and eye color? Using informationfrom problem 3, what fruit flies (genotypes and phenotypes)would you mate to determine the order of the body-color,wing-size, and eye-color genes on the chromosome?

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QUESTION:

A wild-type fruit fly (heterozygous for gray body color andred eyes) is mated with a black fruit fly with purple eyes. Theoffspring are wild-type, 721; black-purple, 751; gray-purple, 49;black-red, 45. What is the recombination frequency betweenthese genes for body color and eye color? Using informationfrom problem 3, what fruit flies (genotypes and phenotypes)would you mate to determine the order of the body-color,wing-size, and eye-color genes on the chromosome?

ANSWER:


The recombination frequency between the body color and eye color genes is 16.2%.

To determine the order of the body color, wing size, and eye color genes on the chromosome, y

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