Cancer Genetics and Genomics II

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Which of the following is NOT a common feature of inherited cancers?

None of the above

In an autosomal dominant disease, if you inherit the abnormal gene from only one parent, you will get the disease.

True

Which of the following is a mechanism that can cause the loss of the second allele in a tumor?

All of the above

Which gene is associated with retinoblastoma, a common primary intraocular malignancy of childhood?

<p>RB1</p> Signup and view all the answers

Which of the following is an example of an inherited cancer syndrome mentioned in the text?

<p>Retinoblastoma</p> Signup and view all the answers

What is the role of oncogenic viruses in somatic cancers?

<p>They play a role in the development of somatic cancers</p> Signup and view all the answers

What is the main focus of individualized/precision medicine in oncology?

<p>Targeted therapies</p> Signup and view all the answers

Why do familial cancer syndromes present as autosomal dominant traits in family pedigrees but have a recessive genetic mechanism?

<p>It is due to the two-hit hypothesis</p> Signup and view all the answers

Which type of viruses can cause cancer in many species?

<p>Both RNA and DNA viruses</p> Signup and view all the answers

What is the role of HPV proteins E6 and E7 in tumorigenesis?

<p>They inhibit tumor suppressor proteins</p> Signup and view all the answers

Which of the following is a mechanism by which HTLV-1 causes cancer?

<p>Activation of proto-oncogenes c-sis and c-fos</p> Signup and view all the answers

What is the main function of adjuvant chemotherapy?

<p>To kill cancer cells left behind after surgery</p> Signup and view all the answers

According to the two-hit hypothesis, which of the following is true about tumor suppressor genes?

<p>They require a loss-of-function mutation in both alleles to initiate tumor formation</p> Signup and view all the answers

Which of the following is NOT a contributing factor to the early age of onset in hereditary cancers?

<p>De novo mutations in somatic cells</p> Signup and view all the answers

Which of the following is true about germline variants in hereditary cancers?

<p>They are inherited and cause family inherited cancers</p> Signup and view all the answers

Which of the following is true about retinoblastoma?

<p>Both copies of the RB1 gene must be mutated or lost for the cancer to form</p> Signup and view all the answers

Which of the following genetic mutations is associated with Von Hippel-Lindau Disease (VHLD)?

<p>VHL</p> Signup and view all the answers

Which hereditary cancer syndrome is associated with an increased risk for colorectal, uterine, and other cancers?

<p>A and D</p> Signup and view all the answers

Which gene is responsible for causing Familial Adenomatous Polyposis (FAP)?

<p>APC</p> Signup and view all the answers

Which of the following is a characteristic feature of Peutz-Jeghers Syndrome (PJS)?

<p>Characteristic polyps of the GI tract</p> Signup and view all the answers

Which type of therapy works by disrupting the cancer cell's signals and exposing them to the immune system for attack?

<p>Immunotherapies</p> Signup and view all the answers

Which method involves looking at a variety of cancer-related genes or genome-wide profile of deletions, insertions, translocations, and amplifications to assist with diagnosis, prognosis, or treatment regime design?

<p>Molecular profiling</p> Signup and view all the answers

Which type of therapy focuses on activated oncogenes and only kills the activated activity of tumor cells?

<p>Targeted therapies</p> Signup and view all the answers

Which type of therapy uses high-energy particles or waves to destroy or damage cancer cells by creating small breaks in their DNA?

<p>Radiation therapy</p> Signup and view all the answers

Which type of testing is used to look for germline mutations?

<p>Familial Testing</p> Signup and view all the answers

When testing for hereditary mutations, what type of sample is typically used?

<p>Blood sample</p> Signup and view all the answers

What is the allele frequency for a heterozygous germline mutation?

<p>50%</p> Signup and view all the answers

What is the allele frequency for a homozygous germline mutation?

<p>100%</p> Signup and view all the answers

Which type of testing focuses on rare mutations?

<p>Somatic Testing</p> Signup and view all the answers

Why can polymorphisms be excluded when performing somatic testing?

<p>Polymorphisms have a frequency greater than 1%</p> Signup and view all the answers

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