ANTH 242 Lecture Notes - Lecture 6: Trisomy, Phenotype, Chromosome
Document Summary
Units of measure: deme (dee-mm): a breeding population, gene pool: all the genetic information within a deme, population (deme) vs. Species (all of the demes that could potentially produce fertile offspring: species: defined by reproductive (not geographic) isolation. Modes of speciation: cladogenesis (clay-doe-gen-eh-sis): usually geographic. Ex: bonobo (pan paniscus) -chimpanzee (pan troglodytes) split: anagenesis (: time and environmental change. Forces of evolution: *make special note of how the forces of evolution influence population variation both between and within groups/populations. Only new source of variation (new genetic information) Point mutations: dna sequence incorrectly copied mistake in recipe for amino acids . Chromosomal mutations: involve all or most of a chromosome: monosomy: missing a chromosome. E(cid:454)a(cid:373)ple: tur(cid:374)er"s s(cid:455)(cid:374)dro(cid:373)e (cid:894)xo(cid:895) o(cid:374)e less se(cid:454) chromosomes. Females: short, sterile, webbed neck, some secondary, trisomy: having an extra chromosome. Males: long limbs, tall stature, more feminine features, sterile.
