Please pick the correct answer choice. (Problem 26a) A cross is made between two
ID: 220056 • Letter: P
Question
Please pick the correct answer choice.
(Problem 26a) A cross is made between two E. coli strains: Hfr arg+ bio+ leu+ × F–arg– bio–leu–. Interrupted-mating studies show that arg+ enters the recipient last, so arg+ recombinants are selected on a medium containing bio and leu only. These recombinants are tested for the presence of bio+ and leu+. The following numbers of individuals are found for each genotype:Based on the data and the illustration, select from the correct genes so that the genes are in the correct order.
gene a: arg; gene b: leu; gene c: bio gene a: leu; gene b: bio; gene c: arg gene a: bio; gene b: arg; gene c: leu gene a: arg; gene b: bio; gene c: leu gene a: bio; gene b: leu; gene c: arg argt bio leu 320 g bio leu0 arg+ bio+ leu8 a 48 arg bio leu
Explanation / Answer
Ans- 26 the correct order is in (b) option i.e
A) leu+ B) bio+ C) Arg+
Because Arg was the last as specified in question and leucine alone is not positive in any case so it will be distant from arg as compared to bio so this order is correct i.e leu, bio, Arg