Variation Flashcards
(8 cards)
1
Q
What is variation?
A
Differences in characteristics of individuals in a population.
2
Q
What causes variation?
A
- Genes (genetic causes)
- Environment (environmental causes)
- Or both.
3
Q
Give examples of characteristics caused by genetic variation.
A
Eye colour, inherited disorders.
4
Q
Give examples of characteristics caused by environmental variation.
A
Language spoken, scars.
5
Q
What is a mutation?
A
A change in a DNA sequence.
6
Q
How often do mutations occur?
A
Continuously, usually with no or little effect.
7
Q
What can mutations lead to?
A
A new phenotype that may be beneficial or harmful.
8
Q
What is the link between mutations and natural selection?
A
Beneficial mutations may lead to evolution through natural selection.
