Mutant Forms of Tumor-Suppressor Genes Act _____; Both Copies of the Gene

question 39

Multiple Choice

Mutant forms of tumor-suppressor genes act _____; both copies of the gene must be _______ before their protective function is lost.

• A)as dominant genetic traits,mutated or deleted
• B)as dominant genetic traits,preserved
• C)recessively,mutated or deleted
• D)recessively,preserved
• E)like sex-linked recessive genes,mutated or deleted

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Definitions:

Genes

Units of hereditary information made of DNA, residing on chromosomes, and containing instructions for the development, functioning, and reproduction of organisms.

Nonviral Organisms

Organisms that do not belong to the virus category and are capable of independent reproduction and metabolism.

Replicate

To duplicate or reproduce an experiment, study, or procedure to verify its results.

Extant Cetaceans

Currently living species of the marine mammal group that includes whales, dolphins, and porpoises.