13,14 What estimate of map distance between ruby and lozenge mutations isindicated by the data provided in the previous question?8.8 CM11.2 CM20 CM10 CM Wild type Drosophila flies have red, round eyes. Recessive mutations in twolinked genes cause the eye shape phenotype "lozenge" and the eye colorphenotype "ruby". To determine the distance between these two genes, a doubleheterozygous female fly with wild type eyes is mated with a male fly that haslozenge, ruby eyes. The following offspring are obtained:88 wild type eyes383 ruby eyes (wild type shape)417 lozenge eyes (wild type color)112 ruby, lozenge eyesWhich of the following correctly describes the arrangement of alleles in thedouble heterozygous parent?more information is necessary to answer this questionruby mutation on one chromosome; lozenge mutation on the homologouschromosomeruby and lozenge mutations on one chromosome; wild type alleles for both genes onthe homologous chromosome

Name: 13,14 What estimate of map distance between ruby and lozenge mutations
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Description: 13,14 What estimate of map distance between ruby and lozenge mutations isindicated by the data provided in the previous question?8.8 CM11.2 CM20 CM10 CM Wild type Drosophila flies have red, round eyes. Recessive mutations in twolinked genes cause the

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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

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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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13,14

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

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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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