Andreea Alexandra Gheorghita
October 4, 2012
- Gene Action
- Dominant and Recessive Traits
- Polygenetic Effects
Next time: Heritability (pg, 117 – 123)
*For the midterm room NS 145* check OWL
*Oct 4 – Oct 23 for psychology discussion online*
Identical twins – genetically identical; see if they have similar behaviors, disorders
- How do genes “work”?
- What is the outcome with recessive genes?
- How is more complex behavior coded?
We would expect a one year old child to recover from traumatic brain damage more quickly than an
Young children have more synapses; increases plasticity.
- If you’re right handed, language is on the left side of the brain (80% of population)
- Left visual field right hemisphere, right visual field left hemisphere
Genetics of Behavior
Nature (something we are born with) versus Nurture (something we learn); both interact and are
important to determine human behavior
- Genes: strange like molecules of DNA, linked to chromosomes.
o Karyotype: genetic blueprint
o Humans have 23 pairs of chromosomes (22 autosomes, and sex chromosomes: XX
and XY – Y chromosome is a lot shorter than the X chromosome)
o DNA provides a template for RNA, which codes for protein molecules (sequence of
o The influence of genes is through protein synthesis.. there are no genes “for” a
o Genes “for” intelligence? Is it possible to have genetic influence for intelligence?
Many people use reaction time as a measure of intelligence. Fas