What is a mutation?
a. a change in a gene which is harmful, beneficial, or has no effect at all.
b. a change in a gene which is only harmful.
c. a change in a gene which is only harmful.
d. no change in a gene.

the answer is A hope this helps

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→