Microevolution

micro levelmicro-evolutionmicroevolutionarymicroevolutionary processesmicroevolutionary selectionmirco-
Microevolution is the change in allele frequencies that occurs over time within a population.wikipedia
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Natural selection

selectionselectiveselected
This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift.
Over time, this process can result in populations that specialise for particular ecological niches (microevolution) and may eventually result in speciation (the emergence of new species, macroevolution).

Macroevolution

macro-evolutionmacroevolutionarymicro-evolution
This change happens over a relatively short (in evolutionary terms) amount of time compared to the changes termed macroevolution which is where greater differences in the population occur. Microevolution over time leads to speciation or the appearance of novel structure, sometimes classified as macroevolution.
Macroevolution is evolution on a scale at or above the level of species, in contrast with microevolution, which refers to smaller evolutionary changes of allele frequencies within a species or population.

Population genetics

population geneticistevolutionary geneticspopulation genetic
Population genetics is the branch of biology that provides the mathematical structure for the study of the process of microevolution.
He helped to bridge the divide between the foundations of microevolution developed by the population geneticists and the patterns of macroevolution observed by field biologists, with his 1937 book Genetics and the Origin of Species.

Antimicrobial resistance

antibiotic resistanceresistanceresistant
Typically, observable instances of evolution are examples of microevolution; for example, bacterial strains that have antibiotic resistance.
Given that lifespans and production of new generations can be on a timescale of mere hours, a new (de novo) mutation in a parent cell can quickly become an inherited mutation of widespread prevalence, resulting in the microevolution of a fully resistant colony.

Allele frequency

allele frequenciesgene frequenciesfrequency
Microevolution is the change in allele frequencies that occurs over time within a population.
Microevolution is the change in allele frequencies that occurs over time within a population.

Yuri Filipchenko

However, Leavitt was using the term to describe what we would now call developmental biology; it was not until Russian Entomologist Yuri Filipchenko used the terms "macroevolution" and "microevolution" in 1927 in his German language work, Variabilität und Variation, that it attained its modern usage.
Yuri Filipchenko (Юрий Филипченко; sometimes spelled Philipchenko) (1882 — 1930) was a Russian entomologist who coined the terms microevolution and macroevolution, as well as the mentor of geneticist Theodosius Dobzhansky.

Punctuated equilibrium

punctuated equilibriastasisequilibrium
* Punctuated equilibrium - due to gene flow, major evolutionary changes may be rare
The symposium focused its attention on how modern microevolutionary studies could revitalize various aspects of paleontology and macroevolution.

Old Earth creationism

old Earth creationistOld Earth creationistsAnswers In Creation
This acceptance of "microevolution" only within a "kind" is also typical of old Earth creationism.
As a form of Old Earth creationism, it accepts mainstream geological and cosmological estimates for the age of the Earth, some tenets of biology such as microevolution as well as archaeology to make its case.

Creation science

scientific creationismCreation biologycreation-science
In creation science, creationists accepted speciation as occurring within a "created kind" or "baramin", but objected to what they called "third level-macroevolution" of a new genus or higher rank in taxonomy.
Whereas evolutionary biologists and creationists share similar views of microevolution, creationists disagree that the process of macroevolution can explain common ancestry among organisms far beyond the level of common species.

Mutation

mutationsgenetic mutationmutated
This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift. Mutations are changes in the DNA sequence of a cell's genome and are caused by radiation, viruses, transposons and mutagenic chemicals, as well as errors that occur during meiosis or DNA replication.

Selective breeding

artificial selectionselectively bredbreeding
This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift.

Gene flow

genetic exchangegeneflowmigration
This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift.

Genetic drift

driftrandom genetic driftrandom drift
This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift.

Ecological genetics

ecological geneticistecological
Ecological genetics concerns itself with observing microevolution in the wild.

Evolution

evolvedtheory of evolutionevolutionary
Typically, observable instances of evolution are examples of microevolution; for example, bacterial strains that have antibiotic resistance.

Bacteria

bacteriumbacterialEubacteria
Typically, observable instances of evolution are examples of microevolution; for example, bacterial strains that have antibiotic resistance.

Speciation

divergedspeciatedspeciate
Microevolution over time leads to speciation or the appearance of novel structure, sometimes classified as macroevolution.

Species

specificspecific epithetspecific name
Macroevolutionary studies focus on change that occurs at or above the level of species.

DNA sequencing

DNA sequencesequencesequencing
Mutations are changes in the DNA sequence of a cell's genome and are caused by radiation, viruses, transposons and mutagenic chemicals, as well as errors that occur during meiosis or DNA replication.

Genome

genomesgenetic materialgenomic
Mutations are changes in the DNA sequence of a cell's genome and are caused by radiation, viruses, transposons and mutagenic chemicals, as well as errors that occur during meiosis or DNA replication.

Radioactive decay

radioactiveradioactivitydecay mode
Mutations are changes in the DNA sequence of a cell's genome and are caused by radiation, viruses, transposons and mutagenic chemicals, as well as errors that occur during meiosis or DNA replication.

Virus

virusesviralvirion
Mutations are changes in the DNA sequence of a cell's genome and are caused by radiation, viruses, transposons and mutagenic chemicals, as well as errors that occur during meiosis or DNA replication.

Transposable element

transposontransposable elementstransposons
Mutations are changes in the DNA sequence of a cell's genome and are caused by radiation, viruses, transposons and mutagenic chemicals, as well as errors that occur during meiosis or DNA replication.

Meiosis

meioticsyzygymeiosis I
Mutations are changes in the DNA sequence of a cell's genome and are caused by radiation, viruses, transposons and mutagenic chemicals, as well as errors that occur during meiosis or DNA replication.

DNA replication

replicationreplication forklagging strand
Mutations are changes in the DNA sequence of a cell's genome and are caused by radiation, viruses, transposons and mutagenic chemicals, as well as errors that occur during meiosis or DNA replication.