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Do now!
Can you think of 5 differences
(variations) between people
that are inherited?
Last lesson
• Variation
Continuous variation
Continuous variation
• Either many genes are involved in that
characteristic
• Or the genes are operating with
environmental effects too
6
5.5
5
4.5
4
3.5
3
2.5
2
1.5
5
5.5
6
6.5
7
7.5
8
8.5
9
Continuous variation
• Either many genes are involved in that
characteristic
• Or the genes are operating with
environmental effects too
• Body mass
• Milk yield
• Hand size
Discontinuous variation
Discontinuous variation
• A single gene
gives the
characteristic
• The gene
operates with
no
environmental
effects
Discontinuous variation
• A single gene
gives the
characteristic
• The gene
operates with
no
environmental
effects
Tongue rolling
Blood group
Eye colour
Sex
Stick the sheet in.
Today’s lesson
• Understand the
difference between
species, breeds,
varieties
Read pages 6 to 9 and write 10 multiple choice
questions (each with 4 possible answers) on the
subject of species, breeds, varieties, selective
breeding and cross-breeding
Multiple choice questions
Which salt is produced when nitric
acid is added to lithium hydroxide?
Which salt is produced when nitric
acid is added to lithium hydroxide?
A. Lithium nitride
Close, but incorrect
Which salt is produced when nitric
acid is added to lithium hydroxide?
A. Lithium nitride
B. Nitric oxide
Incorrect, but sounds “scientific”
Which salt is produced when nitric
acid is added to lithium hydroxide?
A. Lithium nitride
B. Nitric oxide
C. Lithium nitrate
Correct!
Which salt is produced when nitric
acid is added to lithium hydroxide?
A. Lithium nitride
B. Nitric oxide
C. Lithium nitrate
D. Marmite
Humorous!
Read pages 6 to 9 and write 10 multiple choice
questions (each with 4 possible answers) on the
subject of species, breeds, varieties, selective
breeding and cross-breeding