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 population of has been allowed to breed randomly for generations. 25% of the animals display a recessive trait aa, the same percentage as at the begining of breeding. The rest of the animals show the dominant phenotype, with heterozygotes indistinguishable from the homozygous dominants. a. what is the estimated […]

Linkage disequilibrium and LOD score 1.       Gene A has two alleles, A1 and A2. Gene B has two alleles, B1 and B2. In a population, the following haplotype frequencies were observed: A1B1 = 0.2, A2B2 = 0.45, A1B2 = 0.15 and A2B1 = 0.2. Calculate the extent of linkage disequilibrium. […]