Explain why the increased prevalence of sickle cell disease among African Americans actually has more to do with the environment than skin color or other phenotypes used to define races. List other examples of balanced polymorphism. Identify a population group with a high prevalence of sickle cell disease other than […]

Select an article from a magazine or newspaper that has something in it that pertains to biology. This will serve as the “target article” for this assignment. For instance, you can select an article about medicine, invasive species, nature, conservation, genetic technology, ecology, or any other topic that is related […]

a) In explaining their findings, the authors have ignored a major threat to the validity of their estimates of exposure. Explain and discuss this error. b)Specify the alternative study design should overcome this problem and why? c) Rate the study’s internal validity; low, medium or high. Explain this systematically in […]

If we add 100 ul of 0.5 mg/ml ConA and 100 ul of 1 M mannose to 800 ul of a dilute suspension of red blood cells in ConA buffer, what should we expect to happen? Explain why we expect to see these results. (Describe what is happening at the […]