Q1. In the last few decades remarkable fossils have been discovered indicating that the ancestor of cetaceans (whales, dolphins, and porpoises) was a four-legged, terrestrial (land) mammal. Utilize darwin’s theory of evolution by natural selection to explain how a group of ancient mammals couple be the ancestors of a major […]

A 19 year old college student cuts his lower lip while saving and seek medical advice. Physical examination confirms a deeps tissue wound that exhibits the cardinal signs of inflammation. In response to collagen and other basement membrane proteins exposed at the site of injury, platelets release which of the […]

Q1. The control centre for regulating body temperature is in a region of the brain called the hypothalamus. When the body is fighting an infection, the hypothalamus allows body temperature to climb higher than the normal value of about 380C. Explain how this procedure involves both positive and negative feedback. […]

Consider two hypothetical recessive autosomal genes a and b, where a heterozygote is testcrossed to a double-homozygous mutant. Predict the phenotypic ratios under the following conditions. For parts B, C, and D the mutations are in cis. Part A: a and b are located on separate autosomes. Part B: a […]