Constant (and random) mutation diversifies alleles within the genome, thereby expanding the species gene pool. In the context of Darwinian evolution, which of the following alleles are NOT likely to expand within a species gene pool?

Delta-like is the cognate ligand for

Approximately how many protein coding genes are in the human genome? [A]

For a time, some scientists believed all forms of cancer were caused by viruses either due to infection or activation of endogenous proviruses. Which of the following correctly suggests why the virus theory began to fall apart

A gene found in a normal cells genome that can be picked up and altered by a virus to drive cellular transformation is known as a(n)

TGF-β signaling can inhibit cell entry into the cell division cycle. Describe a mechanism by which mitogen signaling through the PI3K/AKT pathway can counteract the inhibitory effects of TGF-β. Be sure to include the factors involved and the specific events that occur in your answer.

Which of the following mechanisms is LEAST likely to contribute to tumorigenesis driven by the myc oncogene?

Hypermethylation of CpG islands is particularly effective at inactivating tumor suppressor genes when it occurs

This part of the Ras protein interacts with other downstream proteins to transmit a signal when Ras is bound to GTP.

Which of the following types of mutations are MOST likely to be found in cancer cells?