Gene Mutations

Front

What is a gene?

Back

a section of DNA that codes for a trait

Front

What is a genetic mutation?

Back

any change in the DNA base pairs

Front

A substitution mutation occurs when

Back

a base pair is replaced with a different base pair

Front

An insertion/addition mutation occurs when

Back

a base pair is added to the DNA strand

Front

A deletion mutation occurs when

Back

a base pair is missing from the DNA strand

Front

A _____ is a coiled-up, condensed, or tightly wound piece of DNA

Back

chromosome

Front

A mutation that helps an organism survive and reproduce

Back

helpful mutation

Front

A mutation that decreases an organism's ability to survive and reproduce

Back

harmful mutation

Front

A mutation that has NO effect on an organism's ability to survive and reproduce

Back

neutral mutation

Front

The base pair adenine always pairs with which other base pair?

Back

thymine