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Sex-Linkage in Fruit Fly

In Drosophila, a cross between males expressing the three X-linked recessive traits, scute bristles (sc), sable body (s) and vermilion eyes (v) and wild type females. What progeny are expected? If you take a male and a female from this group and cross them you get the following results:

genotypes sex number
+ + + females 1000
sc s v males 314
+ + + males 280
+ s v males 150
sc + + males 156
sc + v males 46
+ s + males 30
sc s + males 10
+ + v males 14

Which is the center gene?

What is the recombination for region I?

What is the recmbination for region II?

What is the final map and the intaerference?

 

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This web site is provided for instruction in Botany and Zoology 342 or Genetics 342

Text: Genetics: A conceptural ApproachBenjamin A Pierce

This is our friend Oliver the parrotlet, a true parrot, the smallest in the world.


 

by Kenneth G. Wilson,
Professor of Botany
Miami University
wilsonkg@muohio.edu