The Atavistic Hypothesis effectively says that (pick one): A) Most cancers are a result of a failure of more recently evolved genes to properly regulate more primitive genes. B) Most cancers occur because of mutations in genes that cause cells to divide. C) Mutation rates in protists are higher than in multicellular organisms.
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Step 1: The Atavistic Hypothesis states that genes from ancestors that were present in the past but lost through evolution may reappear after several generations and affect the phenotype and genotype of individuals. Show more…
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Why are primarily childhood cancers like Leukemia and Lymphoma not as clearly connected to the Atavistic Hypothesis? A) The Atavistic Hypothesis explains cancer as a failure to check cell proliferation. B) The Atavistic Hypothesis doesn't apply to cancers that are unrelated to organ or tissue development. C) There is intense selection for high rates of recombination and point mutations in certain cells in the immune system (beneficial to fighting off pathogens), despite the possibility of leukemia and lymphoma.
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Most mutations that determine the progression of human cancers affect germ cells, somatic cells, stem cells, or both somatic and germ cells.
Concerning the causes of cancer, which one is incorrect? a. Genetic mutations cause cancer. b. Genetic mutations can be caused by environmental influences, such as radiation, organic chemicals, and viruses. c. An active immune system, diet, and exercise can help prevent cancer. d. Heredity cannot be a cause of cancer.
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