Question

in certain types of cells, like liver and heart tissues, tetraploid (4n) cells are normal and common. however, sometimes the formation of tetraploid cells may be an unintentional result of exposure to chemicals or other factors. these rogue tetraploid cells may eventually lead to tumor formation. these cells most likely form due to a failure at which phases of the cell cycle? select all that apply.

Explanation:

Tetraploid cells can form due to failure in cytokinesis (the division of the cytoplasm at the end of mitosis) which is part of the M - phase. Also, errors in DNA replication during the S - phase can contribute to abnormal ploidy.

Answer:

S - phase, M - phase