You’re trying to PCR amplify a gene, but your gel shows that there are two bands instead of only one like you expected. You know for certain that there no homologous genes in the genome from which you’re amplifying, so you assume that the issue must be coming from your […]

A student attempts to transform a population of E. coli with a pBluescript plasmid. How do you advise him to identify cells that have the plasmid? Answer Plate the cells on a medium containing X-gal. Cells with plasmids will turn blue. Plate the cells on a medium with ampicillin. Cells […]

Consider the following scenario: Deer Valley Lodge, a ski resort in the Wasatch Mountains of Utah, has plans to eventually add five new chairlifts. Suppose that one lift costs $2 million, and preparing the slope and installing the lift costs another $1.3 million. The lift will allow 300 additional skiers […]

Dentinogenesis imperfecta is a tooth disorder involving the production of dentin sialophosphoprotein, a bone-like component of the protective middle layer of teeth. The trait is inherited asan autosomal dominant. The mutant gene, located on chromosome 4,occurs in about 1 in 6000-8000 people. Assume that a man with dentinogenesis imperfecta, whose […]