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During development in the mother’s uterus, human embryos have pharyngeal pouches (sometimes called gill slits) that later develop into various glands. Fish also have pharyngeal pouches as embryos, but these develop into gills. The best explanation for why human and fish embryos develop pharyngeal pouches is

Explain an advantage the polymerase chain reaction (PCR) has for DNA research.

New drugs are being developed that decrease DNA methylation and prevent the removal of acetyl groups from histone proteins. Explain how these drugs could affect gene expression to help kill tumor cells.

A rare disease is now understood to be caused by a single mutant gene. When the researcher learns that the gene encodes a ________, he says “Oh good! We may be able to treat the disease with recombinant protein produced in E. coli and delivered by injection.”

Two strands of DNA that have been cut by an endonuclease can be sealed together by a(n)

Vertebrate cells possess a protein that binds to clusters of 5-methylcytosine and ensures the gene will stay in the “off” position. This control of gene regulation is a result of

If mRNA is complementary to the DNA template strand and the DNA template stand is complementary to the DNA non-template strand, why are base sequences of mRNA and the DNA non-template strand not identical? Could they ever be?

In the experiment above, guppy color patterns (spots) were measured in populations exposed to increasing amounts of predation.  From this you could conclude that ________.

The most recent techniques developed in the biological sciences allow the manipulation of DNA with the ultimate goal of intervening directly with the ________ fate of organisms.

Some hereditary and age-related diseases are caused by translation errors. Explain why an error in translation may cause disease.