The ability for cancer cells to divide indefinitely is made possible because:

The ability for cancer cells to divide indefinitely is made possible because Cancer cells rebuild their telomeres after every cell division.

At each end of the chromosome, there is a region of repetitive nucleotide sequences, this is called telomere and when a cell begins to become cancerous, it divides more often. Telomeres are crucial for the survival of cancer cells and they are maintained by an enzyme called telomerase.

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.