The chemical processes occuring in the nervous system. For example, the actions of neurotransmitters within the brain
What is a gene
They are biochemical units of heredity that make up chromosomes. They are segments of DNA molecules that code physical features. For example eye colour and psychological features
Concordance rates
The extent to which both twins share the same characteristic
Genotypes
A person's unique genetic make - up that is coded in their chromosomes and fixed at conception.
Phenotype
The expression of a genotype is influenced by environmental factors and becomes a person's phenotype
Evolution
Gradual changes in an inherited characteristic of a species over many generations
Natural selection
The way that any genetically determined bevaiour that enhances the ability to survive and reproduce will continue in future generations
A01 - Humans are biological organisms made up of physicological processes