How do gene duplication and exon shuffling lead to new genes?
What will be an ideal response?
Gene duplication results in a second copy of a gene on the same chromosome. At first, both copies will
produce the same protein. However, over time, mutations can arise that change the genes. If these
mutations are not deleterious, the “new” gene will be able to ultimately produce a slightly different
protein from the original gene that may function slightly differently. Exon shuffling is a mechanism
whereby exons from existing genes are combined in new ways to produce new genes that may produce
new functional proteins.
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Indicate whether the statement is true or false.
Cancer can be considered an inherited disease if ____________________
a. at least one mutation is inherited b. a family member has some type of cancer c. all members of the family share the same gene d. a person inherits a tumor suppressor gene from one of his parents
A male fish has changed into a female fish. What kind of hermaphroditism occurred?
a. Synchronous b. All of these choices c. Protogyny d. Protandry
Processes that supply ATP, reducing power, and precursor metabolites are collectively referred to as ________ reactions.
A. fueling B. redox C. generating D. synthetic