Psychology 1000 Chapter Notes - Chapter 4: Human Genome Project, Final Analysis, Physical Attractiveness

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Terry Biggs

Document Summary

In humans, every cell in the body except one type has 46 chromosomes. The exception is the sex cells which has only 23. Turned off and the levels of a specific protein will then decrease. Dominant, recessive and polygenic effects: genotype and phenotype are not identical because some genes are dominant and some are recessive. Is where they discovered that humans have fewer genes than expected; a human has approximately 25 000 genes and not the 100 000 originally estimated. The effects on behavior are then observed: although gene knockout studies are a powerful tool, researchers need to take great care when interpreting their outcomes. Very little behavior is controlled by a singe gene. Thus, the disruption of a behavior after a gene knockout may help to identify one of the genes involved in the behavior, but this identification does not mean that one gene is wholly responsible for the behavior.