Psychology 1000 Chapter Notes - Chapter 4: Polygynandry, Human Bonding, Behavioral Enrichment

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

A chromosome is a tightly coiled molecule of dna that is partly covered by protein. Polygenic transmission is when a number of gene pairs combine their influences to create a single phenotypic trait. The human genome project began in 1990 and in 2001 the genetic map was published, and another competing project was also in place by american biotech firm called celera genomics. Surprising findings at the end of both projects: humans have fewer genes than expected, and many genes have arisen from genes that bacteria inserted into our early ancestors. In recombinant dna procedures researchers use certain enzymes to cut the long thread like molecules of genetic dna into pieces, combine them with dna from another organism, and insert them into a host organism. A gene knockout procedure is when a specific gene is altered in a way that prevents it from carrying out it"s normal function.