Psych 1000 October 4, 2012
LEC 9 Genetics
How do genes “work”?
What is the outcome with recessive genes?
How is more complex behavior coded?
Visual field – brain has contralateral control of the visual field not the eye itself
because both eyes can see both visual fields
Split brain tests only work for right handed people
The experimenter knows the lateralization of their brain
Right hemisphere cannot express language (cannot “speak”)
Verbal tasks can only be performed by left hemisphere
Genetics of Behaviour
Nature : something we’re born with vs Nurture : something we learn
Both interact to produce human behavior
Strand-like molecules of DNA (deoxyribonucleic acid)
Linked on chromosomes
Karyotype : Genetic blueprint, what genetic material each individual has
In humans, 22 autosomes pairs, 1 sex pair
Genes code for something,
DNA provides a template for RNA
RNA codes for protein molecules (sequences of amino acids)
Protein molecules influence how we develop, how we grow, ie, who we are
The influence of genes is through protein synthesis, there are no genes “for” a
Gene “for” intelligence?
Reaction time, many people judge intelligence by reaction time
Maybe proteins made myelinate neurons and create faster neuron
transmission, therefore highe