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1. In E. coli the following Hfr strains donate the markers shown below in the orders given:Hfr strain Order of gene transfer1 G E B D N A2 P Y L G E B3 X T J F P Y4 B E G L Y PAll the Hfr strains were obtained from the same F+ strain. What is the gene order on the original bacterial chromosome?2. An Hfr strain (arg+, bio+, leu+) is mated to an F- strain (arg-, bio-, leu-). Assume that this Hfr strain transfers arg+ last. You grow the exconjugants on arg- media, supplemented with leu+ and bio+. You recover 423 arg+ exconjugants. These are tested individually for bio and leu and you find the following distribution of genotypes:arg+, bio+, leu+ 360arg+, bio+, leu- 9arg+, bio-, leu+ 0arg+, bio-, leu- 54Determine the gene order and the recombination distances between the three genes.
You cross an M1M2 father with an M2M3 mother and ?nd out that the mean number of nosehairs in dissimilar marker genotypes in their offspring are as follows.
Maintained by balancing selection, such as heterozygote advantage and frequency-independent selection.
What does polar mean in relation to a hydrogen bond?
The lycophytes, sphenophytes, and ferns were once the giants of the plant kingdom and dominated the landscape. Explain why they are presently restricted to certain habitats and are relatively small in stature.
The phosphorylation of ADP to form ATP stores approximately 7.3 kcal per mole o ATP. What is the approximate efficiency of cellular respiration for a "mutant" organism that produces only 29 mole of ATP for every mole of glucose oxidized, rather than ..
how to calculate net filtration pressure of capillary? and venous end?
q1. in a continuous culture of a bacterium running at d0.345 hr-1 glucose is the limiting substrate with a residual
Determine the unexpanded binomial and expanded binomialfor a trait consisting of 4 alleles?
Write the formula for water potential, and give the name for each component. Using the appropriate term(s) in the formula, when will water will enter a cell or exit a cell?
What are the roles of kinases in cell regulation? Why do you think kinases are used, and not another type of enzyme?
Did the flasks that visually had the most dead cells in them have significantly more cells stain blue when Trypan Blue was added than the flasks that appeared healthy (The answer is NO).
The normal eye color of Drosophila is red, but strains in which all flies have brown eyes are available. Similarly, wings are normally long, but there are strains with short wings.
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