1. Based on the figure, what role does the p53 protein play in cell division? Why might a cell need to stop dividing?
2. Why was gamma radiation used in this experiment?
3. Predict what might happen at a cellular level and at an individual level if a person has one normal and one mutated allele of the p53 gene. What if they have two mutated alleles of p53?

Can someone please help me the questions. Please Thank you

1. 15 Mitotic Index (%) C 10- ......= 5 - . . .. 0 12 24 36 48 60 72 84 96 Time (hours) Caption: Alleles of the p53 gene were selectively disrupted in a line of human cells and then monitored after exposure to DNA-damaging gamma (v) radiation to determine what proportion of the cells entered mitosis (cell division). The shaded squares represent cells with two normal alleles of the p53 gene. The half-shaded squares represent cells with one normal and one disrupted allele of the p53 gene (note that some of the half- shaded squares are covered by the shaded squares). The unshaded squares represent cells in which both alleles of the p53 gene were disrupted. The mitotic index is the proportion of cells undergoing mitosis at a given time