Changes in gene (allele) frequencies in a population over time
A group of interbreeding individuals of the same species sharing a common geographical area.
A group of populations that have the potential to interbreed in nature and produce viable offspring
sun total of all alleles within a population
changes in nucleotide sequences of DNA. Mutations provide new alleles, and therefore are the ultimate source of variation
Reshuffling of the genetic material during meiosis (Prophase I and Metaphase I). Assures sperm or egg different from parent
Provided by Mutation and recombination, the raw material for evolution
The frequencies of alleles in a population will remain constant unless acted upon by outside agents or forces. Describes the genetics of Non-Evolving Populations.
Mutations change allele frequencies causing evolution.
if new alleles are brought in by immigrants or old alleles are taken out by emigrants then the frequencies of alleles will change causing evolution.
The accumulation of random events that change the makeup of a gene pool slightly, but often compound over time. Random events little effect on big population but dramatic in small populations.
Severe reduction in population size which reduces the diversity of a population.
occurs when a few individual unrepresentative of the gene pool start a new population
each individual in a population must have an equal chance of mating.
Nonrandom mating in which mates are selected on the basis of physical or behavioral characteristics.