Psychology Lecture 12 (Slide 7-13)
Slide 7: gene influence physical and psychological makeup.
Slide 9: Chromosomes contain sequences of the genes, and 23 are each combined from the sperm and
eggs, and determine the genes that are found in the offspring. Parents have a possibility of making 2 23
different children that have genetically different genes. This will ensure variability is formed among
people. Mutation can also occur during meiosis (the fusion of the gametes), and add to the variability.
Slide 10: cockroaches are considered pests. They breed through meiosis. Even when cockroaches are
exterminated in an area, some survivors can procreate. The offspring will continue to thrive, and inherit
the genetics, like the genes that allowed the parents to be immune to the pesticides. So when they
repopulate, most will survive when you try to exterminate with the same pesticide.