E coli must either make or be supplied with b and c

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Unformatted text preview: ition (called attλ) is known to map between the markers tyr and pro mapped above. You have isolated a λ lysogen of Hfr1 [called Hfr1(λ)] and also a lysogen of the F- strain [called F-(λ)]. Hfr1(λ) was mated to both the F- and the F-(λ) strains. Fill in the following table with the data (in number of minutes of first appearance) expected for the two Hfr crosses. Place an X where you do not expect to see any recombinant progeny. F- nonlysogenic F-(λ) lysogenic Hfr markers recipient recipient gly X 75 leu 9 9 ara X 57 pro 13 13 his X 64 tyr X 48 lys X 80 
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 10 points (Show Your Work) You have a Drosophila line that is homozygous for autosomal recessive alleles a and b. You cross females of this line with males homozygous for the corresponding wild-type alleles. You then cross the F1 heterozygous males with the...
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