Variation

Question 1

What causes variation?

Answer 1

A species genes

Question 2

What causes characteristic features?

Answer 2

. Inherit from your parents via genes
. Environmental ( by your surroundings)

Question 3

2 types of variation:

Answer 3

. Continuous variation
. Discontinuos variation

Question 4

Examples of continuous variation

Answer 4

. Height
. Weight
. Skin colour
. Intelligence

Question 5

What is continuous variation?

Answer 5

The features that can vary over a range of values

Question 6

What is discontinuous variation?

Answer 6

Features that can only take a certain value

Question 7

Examples of discontinuous variation

Answer 7

. Blood type
. Eye colour

Question 8

Where is dna found?

Answer 8

I’m the nucleus of the cell

Question 9

What is dna?

Answer 9

Dan is a long list of chemical instructions on how to build an organism

Question 10

What’s a chromosome?

Answer 10

It is a long coiled up length of dna

Question 11

What is a gene?

Answer 11

A short section of chromosome

Question 12

What do genes do?

Answer 12

Controls many of our characteristics
e.g. hair colour, eye colour

Question 13

How many chromosomes do human body cells have?

Answer 13

46 (23 pairs)

Question 14

How many chromosomes do sperm and egg cells carry?

Answer 14

23

Question 15

What is variation?

Answer 15

Variation refers to the differences that exist between individuals of the same species. It can be caused by genetic factors, environmental factors, or a combination of both.