Discussion 5 Fall 2009 - GENETICS (BIO 325) FALL 2009...

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GENETICS (BIO 325) FALL 2009 Discussion sheet 5 ________________________________________________________________________ 1. A gal - mutant (a) Cannot grow without galactose (b) Is resistant to galactose (c) Can utilize galactose as a carbon source (d) Cannot utilize galactose as a carbon source (e) Can make its own galactose 2. A Str R mutant (a) Requires streptomycin (b) Can grow in the presence of streptomycin (c) Cannot grow in the presence of streptomycin (d) Makes its own streptomycin (e) Cannot make its own streptomycin 3. If a met - thr - Hfr strain is mated with an F - of genotype leu - thi - , prototrophic recombinants can be detected by plating the mixture on (a) Leucine and methionine (b) Threonine and thiamine (c) Leucine and thiamine (d) Methionine, threonine, leucine, and thiamine (e) Minimal medium 4. Transformation is a mode of gene transfer in bacteria (a) that can be utilized for determining the linkage of genes on the bacterial chromosome (b) in which DNA is transferred from one cell to another cell by a bacteriophage (c) in which the donor and recipient cells make physical contact before DNA transfer takes place (d) in which both the donor and recipient cells lyse 5. A cross in Salmonella typhimurium
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Discussion 5 Fall 2009 - GENETICS (BIO 325) FALL 2009...

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