A change that occurs in a gene or chromosome is called a

https://www.google.com/search?source=hp&ei=zqDFXaSbC5H0tAWryoLQCw&q=change+that+occurs+in+a+gene+or+chromosome+is+called+a+++1+++0+++4++++&oq=change+that+occurs+in+a+gene+or+chromosome+is+called+a+++1+++0+++4++++&gs_l=psy-ab.3...3848.3848..4661...0.0..0.125.125.0j1......0....2j1..gws-wiz.T928S0ZMWGI&ved=0ahUKEwikusiHjdvlAhUROq0KHSulALoQ4dUDCAg&uact=5