The p53 and mdm² proteins are involved in the dna damage response pathway. In the absence of dna damage, mdm² mediates the degradation of p53. In the presence of dna damage, p53 is not broken down and forms active tetramers that stimulate the expression of genes that block cell cycle progression. Red blood cells are produced by the division and differentiation of multipotent stem cells. Researchers have observed that mice with a partial loss-of-function mutation in the mdm² gene have a lower concentration of red blood cells in the blood than do mice that express the wild-type mdm² allele. A. Using the model of the p53/mdm² pathway, connect the reduction of mdm² function in mutant mice to the observed concentration of red blood cells. (1 pt) b. Predict how a loss-of-function mutation in the p53 gene is most likely to affect the cell cycle in response to dna damage. Justify your predictions. (3 pts)