while working with cultured mouse cells, a researcher unknowingly treated the cells with a mutagen that causes the deletion or insertion of...

while working with cultured mouse cells, a researcher unknowingly treated the cells with a mutagen that causes the deletion or insertion of individual nucleotides in dna. subsequently, she isolated and cultured a single cell from this group. she noticed that the progeny of this cell were not producing a certain protein and that this affected their survival.