PSYC 100 Lecture Notes - Lecture 3: Biopolymer, Allele, Twin

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Jordan Poppenk

Document Summary

A locus describes the placement of a particular gene. Trait the physical expression of a gene that can be seen in an individual. Allele a trait that is in the dna. Single-gene traits: anxiety can be inherited, verbal abilities. Polygenic trait (made up of multiple genes): iq/intelligence. Individuals share ~99. 5% o f the same genes (~25,000 genes: the remaining 0. 5% accounts for genetic variance. Alleles that do vary: 50% - 25% - 12. 5: dna is shared with siblings, 1/8 dna is shared with cousins. Genotype the entirety of the genetic material. Phenotype the traits that are exhibited. Behavioral genomics links behavior and other psychological traits to genetics: francis galton, hereditary genius (1869) Found that genius is heritable (i. e. , if someone was artistic, chances are they had artists in their lineage who exhibited similar artistic traits: these ideas were not universally accepted by the scientific community.