Need answer ! explain how a mutation in a bacterial cell could it become resistant to infection by a bacteriophage.

The surface of the cell contains protein

By which, bacteriophage can bind to it by protein

but in mutation, they change their genetic material, which do not contain protien

thus by this, it become resistant

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.