FIGURE 12-24 Mutations were used to identify genes that suppress, Su(var), or enhance, Eſvar), position-effect variegation. Some gene products enhance or suppress the spread of heterochromatin Second-site mutations that affect the spreading of heterochromatin Drosophila eye (translocated white*) E(var) Spreading enhanced. More white are silenced. Spreading suppressed. Fewer white are silenced. Su(var)
FIGURE 12-24 Mutations were used to identify genes that suppress, Su(var), or enhance, Eſvar), position-effect variegation. Some gene products enhance or suppress the spread of heterochromatin Second-site mutations that affect the spreading of heterochromatin Drosophila eye (translocated white*) E(var) Spreading enhanced. More white are silenced. Spreading suppressed. Fewer white are silenced. Su(var)
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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Question
In Figure 12-4, certain mutations decrease the relative
transcription rate of the β-globin gene. Where are these
mutations located, and how do they exert their effects on
transcription?
Transcribed Image Text:FIGURE 12-24 Mutations were used to
identify genes that suppress, Su(var), or
enhance, Eſvar), position-effect variegation.
Some gene products enhance or suppress
the spread of heterochromatin
Second-site
mutations that affect
the spreading of
heterochromatin
Drosophila eye
(translocated white*)
E(var)
Spreading
enhanced.
More white
are silenced.
Spreading
suppressed.
Fewer white
are silenced.
Su(var)
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