Which of the Following Statements Best Explains How Gene Duplication

question 50

Multiple Choice

Which of the following statements best explains how gene duplication events, such as those seen in the Hox gene complex, may have allowed the evolution of new morphological forms?

• A) There are more copies of genes, meaning speciation had occurred by polyploidy.
• B) The original gene copy is the outgroup, and the new gene copies are the adaptive radiation.
• C) Without duplicated genes, species would be vulnerable to extinction.
• D) One copy of a gene can perform the original function, while other copies are available to take on new functions.

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Definitions:

Roundabout Trade

Trade involving multiple countries where goods are exported to one country before being re-exported to the final destination.

Double-Coincidence

The situation in a barter economy where two parties each hold an item the other wants, enabling an exact exchange without the need for a medium of exchange.

Commodity Money

Money whose value comes from a commodity of which it is made, such as gold and silver, used historically as a medium of exchange.

Unit Of Account

A standard numerical monetary unit of measurement that provides a consistent way of quoting prices and conducting economic transactions.