Which situation would be the most likely result of a mutation in
a eukaryotic organism that causes it to produce less p21 protein
than normal?

Cell replication would be slowed if the organism receives
radiation.
Cells with radiation-induced DNA damage would continue through the
cell cycle without repairing the damaged DNA.
Cells with incomplete DNA replication would continue through the
checkpoint.
Cells would not respond to growth factors.
Cells would have a hypersensitive response to growth factors.