Below are a list of crosses and a list of progeny phenotypic ratios. Match each cross with the expected progeny phenotypic ratio. Write the letter corresponding to the progeny phenotypic ratio in the space provided on the right of each cross. Each progeny ratio may be used multiple times. If a cross has no corresponding progeny ratio, write an "X" in the space provided.
List of Crosses
1. Monohybrid self (diploids)
2. Monohybrid testcross (diploids)
3. Mutant x wild-type in a haploid
4. Homozygous dominant x Homozygous recessive (diploid)
5. Mutant 1 x Mutant 2 in a haploid
Phenotypic Ratios Observed in the Progeny
a. 1:1
b. 1:2:1
c. 2:1:1
d. 3:1
e. 1:0

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.

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

Where in the cell are ribosomes made?