× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
L
4
d
4
3
k
3
k
3
j
3
k
3
b
3
f
3
b
3
d
3
h
3
Home Q & A Board Biology-Related Homework Help Cell Biology
New Topic  
barry barry
wrote...
Posts: 11630
Rep: 151 1
11 years ago
In some fruit flies, an inversion involving the white-eyed locus (w) moves the w+gene from one end of the X chromosome to a location nearer to the centromere. Flies with a w+ or w+/w genotype are normally expected to have red eyes. However, in flies with the inversion, the eyes are mottled red and white. Explain why.
Read 1283 times
1 Reply

Related Topics

Replies
wrote...
#1
Staff Member
11 years ago
The mottled phenotype is caused by a position effect. During the inversion, the w+ gene is moved from a euchromatic region on the X to a region near the heterochromatin at the centromere. Sometimes genes in this region are not transcribed because the heterochromatin remains condensed throughout the cell cycle. The eye cells in which the w+ gene has become inactivated produce white spots in the eyes. The cells in which the gene is not inactivated produce red spots.
- Master of Science in Biology
- Bachelor of Science
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1038 People Browsing
 110 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 412
  
 3382
  
 1539
Your Opinion
Which is the best fuel for late night cramming?
Votes: 146
Previous poll results: Which 'study break' activity do you find most distracting?