Campbell Biology: Concepts & Connections (9th Edition)

Published by Pearson
ISBN 10: 0-13429-601-X
ISBN 13: 978-0-13429-601-2

Chapter 11 - Review - Page 233: 7

Answer

Proto-oncogenes are actually normal genes, so when they are present at the correct point in time and in normal amounts, they have important roles in regulating cell division and differentiation. Our bodies need these genes for normal functioning. It is only when there are mutations in these proto-oncogenes that cancer results.

Work Step by Step

Proto-oncogenes are actually normal genes, so when they are present at the correct point in time and in normal amounts, they have important roles in regulating cell division and differentiation. Our bodies need these genes for normal functioning. It is only when there are mutations in these proto-oncogenes that cancer results.
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