L16. Only mutations in the nucleotides that are part of exons can have effects on the phenotype of an organism

l9: You cross a dihybrid individual TtWw with a homozygous ttww and obtain the following numbers of each kind of offspring phenotype combination. What is the recombination frequency between these genes?   

Part B. What is the frequency of heterozygous carriers? (type only numbers, no letters)

A nurse in the emergency department is assessing a 68-year-old client with a suspected diagnosis of community-acquired pneumonia (CAP). The client reports productive cough, fatigue, and dyspnea for the past 3 days. The following findings are documented: Confused to time and placeBP: 88/56 mmHgRR: 32/minBUN: 28 mg/dLTemperature: 100.8°F (38.2°C)O₂ saturation: 91% on room air The provider asks the nurse for input on whether the client may require hospital admission. Using the CURB-65 tool, which of the following is the most appropriate nursing recommendation?

Part C. What would be the expected frequency of individuals affected by the disease if first cousins mate? Hint: You need the answer from Part A to calculate this.  

L12: In mammals, early-life experiences—particularly the quality of maternal care—can have lasting effects on offspring behavior and stress responses. Scientists reported that adults from  low maternal care mothers showed increased higher histone methylation and lower histone acetylation around areas associated with GAD1 and BDNF gene promoters.  How would you expect the expression of GAD1 and BDNF to be affected in offspring of low maternal care rats?

L10: A diploid organism (top panel) undergoes a chromosomal mutation that leads to the karyotype seen in the bottom panel. This is an example of 

A population of frogs on a remote pond consists of 75 individuals. The frequency of the luminous color recessive allele (l)  in this resident population is 0.70. in this pond population. Due to flooding, 25 frogs from a neighboring swamp are introduced into the pond. In the swamp population, the frequency of the l allele is 0.15. What is the expected frequency of the luminous color l allele in the new frog population in the pond?

L11: Which is NOT true of most bacterial DNA? A.It consists of a single circular DNA molecule with negative supercoils B.It appears as a distinct clump called a nucleoid. C.It is wrapped around histone proteins. D.It exists in a series of twisted loops. E.It is usually circular

A population of bacteria is exposed to a new antibiotic. After several days, most of the bacteria die, but a few survive and continue to reproduce. Eventually, the entire population becomes resistant to the antibiotic. What is the most accurate explanation for this outcome?