
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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
Transcribed Image Text:What estimate of map distance between ruby and lozenge mutations is
indicated by the data provided in the previous question?
8.8 CM
11.2 CM
20 CM
10 CM

Transcribed Image Text:Wild type Drosophila flies have red, round eyes. Recessive mutations in two
linked genes cause the eye shape phenotype "lozenge" and the eye color
phenotype "ruby". To determine the distance between these two genes, a double
heterozygous female fly with wild type eyes is mated with a male fly that has
lozenge, ruby eyes. The following offspring are obtained:
88 wild type eyes
383 ruby eyes (wild type shape)
417 lozenge eyes (wild type color)
112 ruby, lozenge eyes
Which of the following correctly describes the arrangement of alleles in the
double heterozygous parent?
more information is necessary to answer this question
ruby mutation on one chromosome; lozenge mutation on the homologous
chromosome
ruby and lozenge mutations on one chromosome; wild type alleles for both genes on
the homologous chromosome
Expert Solution
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Since you have asked multiple question, we will solve the first question for you. If you want any specific question to be solved then please specify the question number or post only that question.”
Only when both of the recessive forms of two genes are present does the double recessive phenotype appear. The two genes are thus adjacent to one another and shared by the same chromosome. A gene's likelihood of inheriting another gene's characteristics increases with their proximity.
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