In Drosophila, a cross (cross 1) was made between two mutant flies, one homozygous for the recessive mutation bent wing (b) and the other homozygous for the recessive mutation eyeless (e). The mutations e and b are alleles of two different genes that are known to be very closely linked […]

Phenyl-Sepharose resin consists of a phenyl group attached to a matrix of agarose. Suppose you need to use this chromatographic method to separate a mixture of polypeptides consisting of polyalanine, polyserine, polytryptophan and polylysine. Would you apply these polypeptides in a buffer containing high ionic strength or low ionic strength? […]

One-hundred grams of fresh tomatoes were placed in a stomacher and blended for 45 seconds. A 1 mL sample of blended tomatoes was placed in tube containing 9 mL of Trypticase Soy Broth, and incubated at 37C for 24 hours. After the incubation period, 1 L and 10 L loops […]

Questions: Extinction 1) Describe the natural history and unique physical characteristics of the thylacine. What it ate, where it lived and what did it look like? What were the reasons or factors that caused them to eventually go extinct? 2) In your opinion, what could have been done to stop […]