Please enable JavaScript.
Coggle requires JavaScript to display documents.
Population Genetics and Evolution (Speciation (Natural selection has…
Population Genetics and Evolution
Rates of Evolution
Population Genetics
Gene Pool (total number of allele in all the sex cell)
Factors that cause the Gene Pool to Change
Accidents
Mutation
Multiple selection Pressures
Artificial Selection
Situations in which Natural Selection Does not Operate
Natural Selection
Factors that are not Part of Natural Selection
Intension
Planning
Purpose
Voluntary Decision Making
Evolution and Origin of Life
Condition on earth Before the Origin of Life
Chemical Present in the Atmoshphere
Early Metabolism
Time Available for the Origin of Life
Energy Sources
Oxygen
Chemical Produced Chemosynthetically
Formation of Polymers
Aggregation and Organization
Presence of Life
Speciation (Natural selection has caused a new
species to evolve)
Convergent Evolution
Phyletic Speciation
Vegetative Propagation
Pollen Transfer
Seed Dispersal
Divergant Speciation
Biological Reproductive Barriers (Any biological phenomenon
that prevents successful gene flow)
Postzygotic internal isolation barriers
Hybrid Sterility (Two populations occasionally interbreed or are artificially cross pollinated and produce viable seed, but the seedgrows into a sterile plant )
Hybrid Inviability (If cross-pollination occurs, alleles from one parent may code for proteins incompatible with those coded by alleles from the other, and not even a sterile hybrid can result; instead, the zygote or embryo dies early in development.
Prezygotic isolation Mechanisms (Biological reproductive barriers prevent pollen from moving from one plant to another and thus neither pollination nor fertilization occurs :
Abiological reproductive Barriers (Any physical , nonliving feature
that prevents two populations from exchanging genes)
Adaptive radiation(Special case of divergent evolution in which a species rapidly diverges into many new species over an extremely short time, just a few million years)
