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Unformatted text preview: BICD 100 Page 1 of 2 S. Brody, ext. 42619 Spring 2008 4125 Muir Biology 1 HOMEWORK SET #3 (covering lectures #6, 7, 8) Due Friday, April 18, 2008 ***PLEASE PUT YOUR NAME AND SECTION NUMBER IN INK OR TYPED ON TOP OF YOUR HOMEWORK SET*** 1. ( 22 pts ) Females from a truebreeding wild-type stock of Drosophila melanogaster are crossed to males from a truebreeding stock displaying rudimentary wings (r), garnet eye color (g) and forked bristles (f). The F 1 are all wild- type. F 1 females are backcrossed to the parental males and the following results are observed: Phenotype # of progeny Phenotype # of progeny rgf 2221 r++ 5 rg+ 237 r+f 54 +g+ 47 ++f 255 +++ 2177 +gf 4 a) Draw a map of these three genes indicating gene order and distance between genes. Show your calculations and use the symbols indicated . b) Ten different truebreeding strains displaying rudimentary wings are crossed and the F 1 are scored by wing phenotype. Each of these strains has a deletion in the rudimentary gene locus. The following table shows the phenotype....
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This note was uploaded on 06/07/2008 for the course BICD 100 taught by Professor Nehring during the Spring '08 term at UCSD.
- Spring '08