Question

cells in a developing embryo respond to substances that stimulate them to go through the cell cycle without entering g₀ in order to form many new cells quickly. these substances are produced from the instructions in oncogenes. oncogenes are turned off as organisms mature. what results if the oncogenes are reactivated later during growth and development? cells divide uncontrollably and form tumors. cells make too much dna while in the s phase. cells self - destruct by undergoing apoptosis. cells enter g₀ and remain there indefinitely. clear all

Explanation:

Oncogenes are genes that have the potential to cause cancer. When oncogenes are reactivated, they stimulate cells to divide uncontrollably. This uncontrolled cell division can lead to the formation of tumors.

• Cells making too much DNA in the S - phase is not the typical result of oncogene reactivation. Oncogenes mainly affect cell - cycle regulation and cell division rather than just DNA synthesis in a non - regulated way related to oncogene function.
• Apoptosis (cell self - destruction) is usually regulated by tumor - suppressor genes and other apoptotic pathways, not the reactivation of oncogenes. Oncogenes promote cell survival and division, not cell death.
• Entering \(G_0\) (a quiescent phase) indefinitely is the opposite of what oncogenes do. Oncogenes promote cell - cycle progression and division, not a long - term exit from the cell cycle.

Answer:

Cells divide uncontrollably and form tumors.