Variation
- Created by: emma
- Created on: 12-03-14 16:30
View mindmap
- Variation
- Bottle necking
- Natural event e.g earthquake reduces population
- Smaller gene pool
- reduces genetic diversity
- Smaller gene pool
- Natural event e.g earthquake reduces population
- Natural selection
- Individual with a combination of alleles may have certain desirable characteristics
- These individuals are selected to breed more
- Frequency of their alleles will increase in subsequent generations
- These individuals are selected to breed more
- Individual with a combination of alleles may have certain desirable characteristics
- Artificial selection
- Humans select animals with a desirable characteristic to brees
- gene pool is reduced
- Humans select animals with a desirable characteristic to brees
- Founder effect
- New colonies are formed by a small number of founders
- Smaller gene pool as a smaller range of alleles present
- Reduces genetic diversity
- Smaller gene pool as a smaller range of alleles present
- New colonies are formed by a small number of founders
- Overview
- Intra specific
- variation between members of a species
- Inter specific
- Variation between species
- Genetic divesrsity
- Difference in what genes are present in an organism
- Random assortment, crossing over, random fusion of gamets, mutation
- Difference in what genes are present in an organism
- Gene pool
- Sum of all the alleles of all genes in population
- Polygenic inheritance
- Charactertistics caused by a number of genes acting together
- Each gene may have e a number of alleles
- Charactertistics caused by a number of genes acting together
- Intra specific
- Bottle necking
Comments
No comments have yet been made