Topic 14-Variation

Question 0

Examples of genetic variation are:

Answer 0

Hair colour
Eye colour
Flower colour
Free ear lobes etc

Question 1

What causes variation?

Answer 1

Genetic and environmental.

Question 2

Examples of environmental variation are:

Answer 2

Scars
Piercings
Hair styles
Stunted growth in plants etc

Question 3

What is continuous variation?

Answer 3

Where and individual can be at any point along a range of variation. Example, height can range from smallest to the tallest person in the world.

Question 4

What is discontinuous variation?

Answer 4

Distinct categories of variation. For example blood groups.

Question 5

What is a sexual reproduction?

Answer 5

There is only one parent so the offspring are genetically identical. They are called clones.

Question 6

Reproduction increases variation. Why does this benignity humans?

Answer 6

If the environment changes, there will be a variety which will enable us to adapt to new environments.

Question 7

What is the process of new genes appearing?

Answer 7

Mutation.

Question 8

How is mutation caused?

Answer 8

Exposure to ionising radiation.