BIO120H1 Lecture Notes - Lecture 6: Sexually Transmitted Infection, Eichhornia Crassipes, Amazon River

• School: UTSG
• Department: Biology
• Course: BIO120H1
• Professor: Spencer C H Barrett

Document Summary

Sexual system dioecious (has separate sexes) and hermaphrodite. Mating system cross-fertilization and self-fertilization (form of inbreeding) Offspring are a result of non-sexual processes genetic copies. They can reproduce sexually (warm water) and asexually (cool water) depend on habitat. Time and energy to find and attract mates: cloning does not use time and energy. Increased energetic costs: gametes, behavior, nectar to attract pollinator. Risk of predation and infection: sexually transmitted diseases, predation not aware of the other animals that may eat them. 50% less genetic transmission compared to clonal offspring: sharing genes with another individual. Break up of adaptive genes combinations: may be for the good or bad. Evolution is about gene counting and gene fitness and how many genes are passed onto the next generation. Transmitting double the amount of genes therefore more fit. Bringing together favourable mutations long term benefit. Favourable combinations of mutations brought together more rapidly by sex.