Mutation and Natural Selection

Question 1

Causes of mutation

Answer 1

1) Exposure to a mutagen

2) Chemicals eg in tobacco smoke and radiation

Question 2

Example of mutagen

Answer 2

Ultra Violet radiation

Question 3

Triplet

Answer 3

Special sequence coded for amino acid

Question 4

DNA mutation changes

Answer 4

Amino acid sequence and a different protein may be produced

Question 5

If gene produce incorrect proteins

Answer 5

Cells may not function properly

Question 6

Mutation

Answer 6

A spontaneous change in a gene or chromosome and are comparatively rare.

Question 7

Gene mutation

Answer 7

One or more genes are incorrectly replicated

Question 8

Chromosome mutation

Answer 8

The damage, loss or gain of a chromosome in mitosis or meiosis

Question 9

Down’s syndrome

Answer 9

The addition of a chromosome

Question 10

An abrupt change is likely to result

Answer 10

Defective enzyme or protein

Disrupt a reaction

Question 11

How many percent does DNA code for genes?

Answer 11

3%

Question 12

Junk DNA

Answer 12

When DNA code for unsure function

Question 13

Neutral mutation

Answer 13

When mutation occurs in junk DNA, it is unlikely to have an effect on the organism.

Question 14

If mutation occurs in a gamete

Answer 14

It will affect all cells in the developing organism

Question 15

Genes are made of

Answer 15

DNA

Question 16

Proteins are made of

Answer 16

amino acids

Question 17

What does the order of triplets in a gene determine?

Answer 17

Sequence of amino acids (AA’s)

Question 18

The orders of AA’s determines

Answer 18

Protein