Mutataions Flashcards
Genetic change
Change to the DNA
Mutataion
A random change to genetic material
Types of mutations
Neutral
Advantage
Disadvantage
Facts the increase the rate of a mutation
Radiation
Chemicals
Adaptions
Inherited characteristics that make an organism well suited to its environments
Variation
No one looks the same
Discrete variation
Gender
Eye colour
Hair colour
Continuos variation
Height
Weight
Temperature
Natural selection
Survival of those organisms best adapted to their envirnment
Types of isolation barriers
Geographical - river
Ecological - pH
Behavioural - differences in timing
What is the only new source of alleles
Spontaneous mutations
New alles produced by mutations can result in
Plants and animals becoming better adapted to the environment
When does natural selection occur
It occurs when thre are selection pressures
What can the best adapted species do
Survive to reproduce, passing on the favourable alleles that confer the sective advantage
When does speciation occur
After a part of a population becomes isolated by isolation barriers
