A cross in Drosophila melanogaster involved the recessive X-linked genes for white eye (w), yellow body (y)., and cut wings (c). A wild-type tri-hybrid female was crossed with wild-type males and only the male offspring were tallied. On the basis of the results shown below, which of the choices shown best represents the genetic map of the three loci on the X-chromosome? Phenotype Male Offspring + yct 63 W ++ 60 w y ct 16 + + + 11 + + ct w y + + y + 247 w + ct 197

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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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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Part A
A cross in Drosophila melanogaster involved the recessive X-linked genes for white eye (w), yellow body (y), and cut wings (c). A wild-type tri-hybrid female was crossed with wild-type males and only the male offspring were tallied. On the
basis of the results shown below, which of the choices shown best represents the genetic map of the three loci on the X-chromosome?
Phenotype
Male Offspring
+ y ct
63
W + +
60
w y ct
16
+ + +
11
+ + ct
w y +
2
+у +
247
w + ct
197
5.5 mu
21.5 mu
ct
5.5 mu
21.5 mu
ct
21.5 mu
5.5 mu
y
w
ct
4.5 mu
20.5 mu
ct
20.5 mu
4.5 mu
y
ct
Transcribed Image Text:Part A A cross in Drosophila melanogaster involved the recessive X-linked genes for white eye (w), yellow body (y), and cut wings (c). A wild-type tri-hybrid female was crossed with wild-type males and only the male offspring were tallied. On the basis of the results shown below, which of the choices shown best represents the genetic map of the three loci on the X-chromosome? Phenotype Male Offspring + y ct 63 W + + 60 w y ct 16 + + + 11 + + ct w y + 2 +у + 247 w + ct 197 5.5 mu 21.5 mu ct 5.5 mu 21.5 mu ct 21.5 mu 5.5 mu y w ct 4.5 mu 20.5 mu ct 20.5 mu 4.5 mu y ct
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