As described in your textbook, one way to determine if a segment of chromosomal DNA has been inserted into a vector is to put XGal in the growth media. Following overnight growth, some of the colonies are blue and some are white. Why are some colonies white?

Which of the following components are not needed for PCR?

Researchers conducted Northern blotting on a sample of cells from mouse kidney, brain, and liver using a probe that is complementary to a gene that encodes a glucose transporter.  All of the samples were taken from the same mouse. The following results were obtained: If we assume that equal amounts of total cellular RNA was loaded into each lane, which of the following statements is false?  

A primer used in dideoxy DNA sequencing is 20 nucleotides long and has the following sequence:  5’-GGATCCATGACTAGTCCGAC-3’. A segment of DNA is cloned into a vector and then the vector DNA is denatured and subjected to dideoxy DNA sequencing method. Below is the DNA sequence from a region of the vector. The primer-annealing site is shown in bold and underlined.    3-CCCGATCGGCCTAGGTACTGATCAGGCTGAATGACT-5’   Based on the sequence above, what would be the size(s) of the band(s) (i.e., the number of nucleotides in each band) in which dideoxyT had been added to the sequencing reaction?

Work in a forensic lab and you need to do a paternity test. You would:

You observe a small patch of white hair on the head of an infant. The possible genetic explaination for this is:

You can use tandem mass spectrometry to:

You want to do an experiment to check after application of a hormone to cells a protein is has multiple phosphate groups attached to it. You would use a:

The identification of a stop codon for a particular gene is an example of

The Cas9 protein in CRISPR-Cas technology will: