BIOL10004 Lecture Notes - Lecture 30: Population Bottleneck, Genetic Drift, Sexual Reproduction

• School: University of Melbourne
• Department: Biology
• Course: BIOL10004
• Professor: Dawn Gleeson

Document Summary

* about 1. 5 million species have been named, but many more require formal descriptions. * species are usually named by looking at things like morphology. * insects are the most diverse group and almost half of all insects are beetles. * prior to 1982, most biologists thought the number of undescribed species was roughly the same as the number described. Terry erwin then calculated that the number of species in a tropical rainforest is 31,400,000. Now, the estimates of global species diversity range from 2 to 80 million. * all of this diversity is a product of evolutionary processes. * phenotypic diversity observed variation among individuals in morphology, development or behaviour. * genotypic diversity the ge(cid:374)es a(cid:374) orga(cid:374)is(cid:373) i(cid:374)herits (cid:894)differe(cid:374)(cid:272)es are so(cid:373)eti(cid:373)es (cid:862)i(cid:374)(cid:448)isi(cid:271)le(cid:863)(cid:895) the underlying genetic components that results in phenotypic diversity. * four evolutionary (cid:858)for(cid:272)es(cid:859) (cid:272)o(cid:374)tri(cid:271)ute to ge(cid:374)erati(cid:374)g a(cid:374)d (cid:373)ai(cid:374)tai(cid:374)i(cid:374)g di(cid:448)ersity. * (cid:272)ha(cid:374)ge to the stru(cid:272)ture of a(cid:374) orga(cid:374)is(cid:373)(cid:859)s dna.