Bio 182 Exam 2 ASU Latest Version Graded A+

Bio 182 Exam 2 ASU Latest Version Graded A+ abiotic physical conditions adaptive plasticity one genotype has multiple phenotypes & environments trigger change allopatry populations occur in different places biological species group of potentially interbreeding species biotic other organisms Cladistics Grouping is based on common ancestry Do enzymes maintain a rigid structure while catalyzing? No it is constantly changing Do smaller or larger populations have more chance for genetic drift? Smaller populations Each nucleotide represents? the state of a single trait Environmental examples air temp food availability social group evolutionary species lineage that remains distinct throughout space & time Fisher's Model Assume: Each set of parents give birth to two offspring. A new allele (a) arises, which has no effect on fitness (fitness of Aa = fitness of AA). Fisher 1930, The Genetical Theory of Natural Selection Then: Within each couple, there is a 25% chance the new allele will be lost during reproduction. Gene flow dispersal of organisms btw genetically distinct populations genetic drift evolution caused by random processes in population in a population of finite size Genetic drift can do what to neutral