PSYC 3100 Lecture Notes - Lecture 6: Anisogamy, Sexual Reproduction, Multimate

• School: University of Guelph
• Department: Psychology
• Course: PSYC 3100
• Professor: Don Dedrick

Document Summary

Sexual: two individuals fuse their genomes to create a new individual. If fitness equals the number of potential copies of genes in the next generation. A sexual reproducer has to work harder, since it only transmits half its genetic material. Note: an organism that has to work harder at anything is at a huge disadvantage relative to another, less hard working organism. A sexual reproducer has to find a mate. Sexual reproduction is costly, but is widespread among multicellular organisms. Since it is so costly, it probably has some sort of evolutionary advantage to pay for that cost. Did it evolve to increase variation, a necessary condition for natural selection: maybe not (phenotype-genotype relationships) natural selection looks at) Genetic change exists in asexual reproduction: if it does, variation does not always increase fitness. Imagine two competing populations, on that reproduces sexually, on asexually. You can have genetic changes in an organism without a lot of phenotypic change (what.