In a transduction system using P1 page, the donor is pur pro* his and the recipi

Question

In a transduction system using P1 page, the donor is pur pro* his and the recipient is pur pro his*. The donor allele pur is initially selected after transduction, and 50 pur transductants are then scored for the other alleles present. Here are the results: 4. | # colonies Genotype pro+ his pro* his pro his+ pro his total 4. 24 13 50 a. What is the cotransduction frequency for pur and pro? (1 pt) b. What is the cotransduction frequency for pur and his? (1 pt) c. Which of the unselected loci is closest to pur? How do you know? (2 pt)

Explanation / Answer

a) co-transduction frequency for pur and pro is = no of co transductants / total transductants = 0.26

b)cotransduction frequency for pur and his is = no of co transductants / total transductants 23/50 = 0.46

c) pur and his are closest as they have a higher co-transduction frequency which must have been a result of them being closer enough to be transduced together more frequenctly

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