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  3. . a wild-type hfr is mated to an f- strain that is

. A wild-type Hfr is mated to an F- strain that is io+ zy- ....

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Biology

. A wild-type Hfr is mated to an F- strain that is io+ zy- . Inthe absence of inducer and glucose what should happen toβ-galactosidase levels immediately after the mating (increase,decrease, or stay the same)? a. Explain your answer. b. Describewhat would happen if the F- recipients were i+ oc zy- . c. Indiploids, would you expect cap+ to be dominant or recessive to cap-? Refer to lac expression and describe the phenotype of cap+ , cap-, and cap+ /cap- bacteria. d. What would be the effect on lacoperon expression of a mutation in cap that caused it to bind toDNA in the absence of cyclic AMP?

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3.7 Ratings (367 Votes)
Immediately after the mating the HFr chromosomal strand displaces and moves through the conjugation bridge into the F strain Since its a wild type HFr strain it will be iozy As it gets transferred it will undergo homologous recombination to yield a F strain with the same genotype where the displaced strand will be degraded In absence of any inducer and glucose the beta galactosidase    See Answer
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