Mastering Genetics Homework 9 due Mon Mar 27 1159pm chapt 12

Mastering Genetics: Homework 9 due Mon Mar 27 11:59pm: chapt 12-12 6- Google Chrome Secure https:// ession masteringgenetics.com/myct/itemView?assignmentProblemID 4932847 signed in as Tasnuva Tarek BIOL203-Hunter College-Spring 2017 Practice Problem 30 Resources x previous l 14 of 15 l next Practice Problem 30 Part A In an experiment similar to the Lederberg and Tatum On which type(s) of media will the AX strain grow? experiment, researchers grew two strains of E. coli in Select all that apply. complete medium. E coli strain AX has the genotype Ampsbio+ trp+ leu-. eu- E. coli strain AY has the genotype AmpRbio- trp- leu+. bio- leu-trp-bio- ampicillin The researchers then plated the bacteria on different media types. complete medium complete medium ampicillin My Answers Give Up Correct Bactria that are Amps cannot grow in the presence of ampicillin. If a strain of bacteria has a mutation in a gene that is necessary to make an essential nutrient (for example, leu. then the strain requires that nutrient to be provided in the medium. Part B On which type(s) of media will the AY strain grow? 4 PM Ask me anything 3/26/2017

Solution

If genetic transfer take place then ideally strain should grow in the media lacking any combinations of leucine, tryptophan and biotin so the correct answer is bio- leu-, trp- leu-, leu- trp- bio-