The locations of six deletions have been mapped to a Drosophila chromosome, as shown in the following deletion map. Recessive mutations a, b, c, d, e, and f are known to be located in the same region as the deletions, but the order of the mutations on the chromosome is not known. ChromosomeDeletion 1Deletion 2Deletion 3Deletion 4Deletion 5Deletion 6When flies homozygous for the recessive mutations are crossed withflies heterozygous for the deletions, the following results are obtained,in which "m" represents a mutant phenotype and a plus sign (+)represents the wild type. On the basis of these data, determine therelative order of the seven mutant genes on the chromosome.MutationsDeletionamm34mS E + + + + +a + + E E E +* + + E E E EU E + E E + +a + + E + + E- E E + + + +

Mutation is an abrupt change in the DNA sequence and nucleotide base pairs. Mutation is caused by…

Answered: Chromosome Deletion 1 Deletion 2…

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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The locations of six deletions have been mapped to a Drosophila
chromosome, as shown in the following deletion map. Recessive
mutations a, b, c, d, e, and f are known to be located in the same region
as the deletions, but the order of the mutations on the chromosome is not
known.

Chromosome
Deletion 1
Deletion 2
Deletion 3
Deletion 4
Deletion 5
Deletion 6
When flies homozygous for the recessive mutations are crossed with
flies heterozygous for the deletions, the following results are obtained,
in which "m" represents a mutant phenotype and a plus sign (+)
represents the wild type. On the basis of these data, determine the
relative order of the seven mutant genes on the chromosome.
Mutations
Deletion
a
m
m
3
4
m
S E + + + + +
a + + E E E +
* + + E E E E
U E + E E + +
a + + E + + E
- E E + + + +

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