Where is the gal224 mutation located? Select one: A. between metD and cys B. bet

Question

Where is the gal224 mutation located?

Select one:

A. between metD and cys

B. between metD and purA

C. between malT and purA

D. between argG and cysC

E. between malT and argG

A new mutant allele, gal22d, is isolated that confers a gal phenotype. The gal224 strain is also Met, Mal, Arg, Pur and Cys. You cross this strain with the Hfr1 strain above, which is gal select for Ga exconjugants, and screen 100 exconjugants for the presence of the other alleles: CROSS SELECTION TRANSDUCTANTS NUMBER Hfr1 gal"X Gal+ cysC 1224 39 argGt. 85 15 argG- malT 100 mal7- Where is the gal224 mutation located?

Explanation / Answer

B. Between metD and purA

As no colony of metD and purA is produced. So there may be chances of mutation, between metD and purA.

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