biology

changes in allele frequencies due to random sampling effects between generations

increases variation among populations

• Species cannot stay the same forever
• with in small populations, RGD leads to inbreeding
• RGD opposes othr evolutionary forces

the process by which one species splits into two or more species

species as a population whose members have the potential to interbreed in nature and produce viable fertile offspring, but do not produce viable fertile offspring with member of other such groups

• habitat isolation- do not encounter each other
• temporal isolation different time of day
• behavioral- different rituals

prevent mating from occurring

• different country
• formation of new species in populations that are geogrpahically isolated from one another

• same county
• formation of new species in populations that lin=ve in the same geographic area

an evolutionary change in the rate of timing of devlopment events.

fixation of genetic differences in isolated populatoins, that produce barriers to gene flow

fixation of genetic differences in contiguous populations, that porduce barriers to gene flow

chance fixation of genetic difference in isolated popultions, that porduce barriers to gene flow

a process that produces a cluster of species occupying a series of similar habitats, al evolving from a recent ancestor

the retention in an adult organism of the juvenile features of its evolutionary ancestors

a display of the chromosome pairs of a cell arranged by size and shape

the genetic material of organism or virus; the complete complement or an organism's or virus's genes along with its nocoding nucleic acid sequences

the study of whole sets of genes and their interactions

a scientific discipline focused on classifying organisms and determining their evolutionary relationships

the evolutionary history of a species or group of related species

an approach to systematics inw hich organisms are placed into groups called clades based primarily on common descent