PSY354H5 Lecture Notes - Lecture 2: Meiosis, Genetic Recombination, Coevolution
Document Summary
Psy 354 - lecture 2: sex & evolution. ** by studying sexual evolution we can learn how behavior has changed and why it has changed. Diverse methods of reproduction have evolved over time . Our sexuality evolved from the sex lives of non-human creatures that preceded us! Evolved from non-humans and there was evolution. The earliest known organisms to use dna as a genetic repository were microscopic, single-celled organisms that reproduce by splitting in two (binary fission). In these early organisms, dna was exchanged between individuals. Key feature as the offspring carries the mixture of parents. Fusion of gametes (ovum and sperm) and the fusion ends up being produced by meiosis. Change in the genetic composition of a population over time. Genetic code is modified and these modifications are heritable and passed down from one generation to another. Nowadays, biological, psychological and social factors have also affected generations.
