Figure 20-17 shows a sequence of mutations that might underlie the development of colorectal cancer.Explain why the loss of p53 is advantageous to cancerous cells. 
Figure 20-17
Definitions:
Unconscious Conflicts
Psychological struggles within an individual that are not within the immediate awareness, often stemming from repressed thoughts or feelings.
Humanistic Theories
A psychological perspective emphasizing individual potential and stress on self-growth, free will, and inherent goodness of humans.
Unconscious
A part of the mind that is inaccessible to the conscious mind but that affects behavior and emotions.
Repressed Memories
Memories involuntarily repressed because they're linked to intense stress or traumatic experiences.
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