Question

Sometimes there is a mistake made when DNA is copied. This is called a mutation. Which of the following is true about mutations?

1) Mutations are always harmful
2) Mutations can be beneficial
3) Mutations only occur in humans
4) Mutations are always caused by external factors

Answer 1

Mutations are permanent changes in the DNA sequence and can be caused by mistakes during replication or exposure to mutagens. They can be beneficial, harmful, or have no effect. Mutations can occur in any living organism and can be caused by external factors or can happen spontaneously.

Step-by-step explanation:

Mutations are permanent changes in the DNA sequence and can occur due to mistakes during DNA replication or exposure to mutagens.

They can be of different types, such as substitutions, insertions, deletions, and translocations. Mutations can either be harmful, beneficial, or have no effect at all.

They are not limited to humans and can happen in any living organism.

Some mutations are caused by external factors, like exposure to radiation or certain chemicals, while others occur spontaneously.