AP Bio Unit 7 Quest

using data from DNA and other molecules to determine evolutionary relationships between organisms

common ancestor and all of its descendants

measuring the absolute time of evolutionary change, some genes/genomes appear to evolve at constant rates

hypothetical or last common ancestor

most distantly related species in cladogram

process by which one species splits into two or more species

changes over time in allele frequencies in a population

broad pattern of evolution above the species level

offspring that result from interspecific mating

block fertilization from occuring

can contribute to reproductive isolation after hybrid zygote is formed

population forms new species while geographically isolated from parent population

speciation occurs in populations that live in same geographic area

species can originate from an accident during cell division that results in extra set of chromosomes

periods of apparent evolutionary stasis punctuated by sudden change

new species change most as they branch from a parent species then change little for the rest of their existence

something in geography keeping species apart

reproducing at different times

mating behavior differences

anatomy differences for reproduction

molecules on gametes not compatible

fertilized egg

phenotypic diversification and speciation as new habitats become available