Psychology 1000 Chapter Notes - Chapter 4: Behavioural Genetics, Chromosome, Phenotypic Trait

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Laura Fazakas

Document Summary

Phenotype the observable characteristics produced by the genetic endowment. Difference between genotype and phenotype because some genes are dominant while others are recessive. Chromosome tightly coiled molecule of deoxyribonucleic acid (dna) that is partly covered by protein. Genes the dna portion of the chromosome that carries the hereditary blueprint units called genes o. Dominant gene a gene that, when present, will produce a particular characteristic. Recessive gene a gene whose characteristic will be masked by a corresponding dominant gene; its characteristic will be expressed if the correspondent gene is also recessive. Polygenic transmission when a number of gene pairs combine their influences to create a single phenotypic trait: many characteristics are polygenic in origin. Recombinant dna procedures when researchers use specific enzymes to cut the long threadlike molecules of genetic dna into pieces, combine them with dna from another organisms, and insert the new strands into a host organism, such as bacterium.