mutations

Question 1

What is a mutation

Answer 1

A mutation is a change in the DNA of an organism. The change may or may not result a change to the physical characteristic of the organism

Question 2

features of mutations

Answer 2

mutations that occur in a gamete (sperm or egg) can be passed to the next generation, whereas mutations that occur in body cells maybe harmless or may result in a disease such as cancer

Question 3

Examples of mutagens

Answer 3

X-ray, ionizing radiation, chemicals (tar from cigarettes)

Question 4

Types of mutations

Answer 4

substitution, insertion, deletion

Question 5

What is substitution mutation

Answer 5

The change in base to a different base. This happens when DNA is copied incorrectly

Question 6

What is insertion mutation

Answer 6

The insertion of an additional base into the DNA

Question 7

Deletion mutation

Answer 7

The deletion of a base from the DNA

Question 8

What is the missense and nonsense mutation

Answer 8

Missense mutations result when a different amino acid is being coded for. leading to a different meaning. And a nonsense mutation results when a genetic code cannot be read or has no meaning