The kinked (ki) and the striped (sr) genes of Drosophila are linked. Both are located on chromosome 3 at map positions 47.6 and 62, respectively. The recessive all (ki) of the kinked gene causes kinked bristles instead of straight. The recessive allele (sr) of the striped gene causes stripes on the back of the thorax that are not present in wild type flies. Homozygous male fruit flies with "kinked" bristles and normal thorax are mated to homozygous females with normal bristles and "striped" thorax.

a.) Draw out the cross described above. Illustrate the pair of 2nd chromosomes, including the kinked and striped alleles, of the male and of female flies.
b.) Draw the chromosomes and alleles for the F1 offspring of the cross in part a. c.) If the F1 hybrid female fruit flies are mated to tester males with kinked bristles and striped thorax, what phenotypes are expected in the F2 generation? Predict % of each of the different phenotypes.

In 1959, doctors began using the powerful antibiotic methicillin to treat infections of staphylococcus aureus, but within two years, methicillin-resistant strains of s. aureus (mrsa) appeared. how did the resistant strains of s. aureus emerge? in 1959, doctors began using the powerful antibiotic methicillin to treat infections of staphylococcus aureus, but within two years, methicillin-resistant strains of s. aureus (mrsa) appeared. how did the resistant strains of s. aureus emerge? staphylococcus aureus bacteria that were able to synthesize cell walls using a protein that was not affected by methicillin survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common. in response to treatment of staphylococcus aureus infections with methicillin, some bacteria began to synthesize cell walls using a protein that was not affected by methicillin. these bacteria survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common. in response to treatment of staphylococcus aureus infections with methicillin, bacterial populations gradually began to synthesize cell walls using a protein that was not affected by methicillin.

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from

How do living things obtain phosphorus