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Multiple crosses were made between true-breeding lines of black and yellow Labrador retrievers. All the F1 progeny were black. When these progenies were intercrossed, they produced an F2 generation consisting of 91 black, 39 yellow, and 30 chocolate (brown) dogs. Based on your epistatic pathway, is there a scenario where mating a yellow lab and a chocolate that could only result in black lab puppies?

Use the results of a PCR from DNA extracted from cheek cells of students and run on a gel shown below to determine the value of your test statistic based on a chi-squared test for the population. The ‘A’ allele is 50 base pairs longer than the ‘a’ allele. Remember samples are loaded at the top of the gel.

A man with hemophilia mates with a woman who is normal but whose father was a hemophiliac.  What percentage of their daughters would you expect to be hemophiliacs?

Use the results of a PCR from DNA extracted from cheek cells of students and run on a gel shown below to determine what you would expect if this population is in Hardy-Weinberg Equilibrium (HWE). The ‘A’ allele is 50 base pairs longer than the ‘a’ allele. Remember samples are loaded at the top of the gel.

Short DNA strands that are complementary to DNA sequences on either side of the gene or DNA sequence of interest are synthesized and used to initiate its amplification in vitro by a special (heat-stable) DNA polymerase in a procedure known as:

True or False. Acetylation of histones is correlated with decreased gene expression.

The coefficient of relationship is best represented by which of the following?

Transcription takes place in which part of the eukaryotic cell?

Seed capsule shape in Shepard’s Purse is controlled by two genes where dominant allele at either of these genes will produce the triangular phenotype.

True or False. In a PCR reaction dNTPs are the nucleotide building blocks used to manufacture the new strand of DNA. In contrast, in a sequencing reaction both dNTPS and ddNTPs are used.