Uncategorized

Normal red blood cells are due to a dominant gene (b); sickle cell anemia to its recessive allele (b). In this problem a person who is a carrier of sickle cell anemia is considered to have normal red blood cells. A normal man whos father had sickle cell anemia marries […]

Question 1: Which are homologous features?A. similar hind leg shape in hopping animals (grasshoppers, rabbits, fleas, kangaroos, frogs, etc.)B. similar coloration (white in winter) in various Arctic bird and mammal speciesC. similar overall body shape in creatures that live underwater (streamlining)D. similar details of bone shape and arrangement in the […]

As you continue on in your career, you become keenly interested in the mechanisms of immune cell recruitment during the innate immune response. After years of graduate work, you discovered a new cytokine (X), which chemoattracts neutrophils. In your excitement you begin devising experiments to characterize the function and relevance […]

The first of the two “undeniable facts” is that any localized population of a species has the potential to produce far more offspring than the local environment can support. This fact is important to understanding evolution because it means that __________. -there is competition for survival among the individuals of […]