8. Should we use blind (unknown to the examiner) tests to evaluate the accuracy of a scientist? Please explain your answer.9. Assume you found your sibling’s brother-in-law has had a sample submitted to the lab. This is a person you have never met, but that you know has been in […]

Q1. A fruitfly with red eyes and leg bristles (genotype RrBb) was mated with a white-eyed fly lacking bristles (rrbb). Five hundred offspring were counted, with the follow results- 58 Rrbb offspring; 62 rrBb offspring; 200 RrBb offspring; 180 rrbb offspring. Based on these results, how much distance is between […]

A new recessive mutation in chickens that causes feather loss from the wings is being investigated. Describe the expected progeny phenotypes from a cross between a hen with feather lesswings and a true-breeding wild type rooster if: a. The gene coding for feather loss is on the Zchromosome b. The […]

Q1. To set up a link between specific bacterium and skin disease, researchers have shown that a bacterium was present in sick persons but not in healthy individuals. They isolated bacterium in a pure culture and demonstrated that experimental healthy animals injected with this culture became sick. What other test […]