B14.1 Variation Flashcards
1
Q
What is variation ?
A
The differences in the characteristics of individuals in a population
2
Q
What are the three main causes of variation ?
A
- genetic variation Eg hair colour and eye colour or blood type
- environment Eg scars and learned behaviours
- both genes and environments Eg Height in humans
3
Q
Why is height both genetic and environmental ?
A
Some people have alleles that make they likely to grow taller however they need to have enough calcium in their bones to fully develop
4
Q
What are mutations ?
A
Random changes to DNA
5
Q
Why is there variation within a population ?
A
Random genetic mutations
