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Evolutionary Genetics

Evolutionary genetics is the study of how evolutionary theory, which is based on the mechanism of natural selection, is related to genetic theory. This field of study combines the use of molecular methods to examine evolutionary patterns and analyze how the genes within populations change over time. Evolutionary processes take place at the population level.

The mechanisms of mutation, genetic recombination, migration and hybridization are responsible for creating genetic variation within populations. This genetic variation spreads through populations by the processes of genetic drift and gene flow and ultimately natural selection. It is through the method of natural selection that certain traits become more or less common.

It is through evolutionary genetics that the history and origins of different species can be studied. For example, phylogenetics is a field of study in which the relationships between different organisms are examined and hypotheses are made about the relatedness of particular groups of organisms.

Furthermore, evolutionary genetics is also related to the subjects of sexual selection, reproduction and factors such as migration and non-random mating which all have an influence on evolution. Over subsequent generations the genetic variation within populations becomes changed and the study of evolutionary genetics is devoted to uncovering how and potentially why these changes have occurred. 

 

 

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Categories within Evolutionary Genetics

Phylogenetics

Postings: 6

Phylogenetics is a topic in biology which analyzes and illustrates the divergence of species and the evolutionary relationships between different groups of species.

Patterns of Selection

Postings: 7

The patterns of selection are specific mechanisms which help to explain how certain genes become favoured and prevalent in a population.

Sexual Reproduction

Postings: 4

Sexual reproduction is the process responsible for the creation of a zygote.

Asexual Reproduction

Postings: 4

Asexual reproduction is a process in which there is no exchange of genetic material, like there is in sexual reproduction, because it involves the inheritance of genes from one parent.

Explanations for Salamander Colour Differences

Imagine that on your visit to a hypothetical island near a hypothetical continent, you observe that one species of salamander occurs in several colors, but most of the salamanders are yellow. This same color mix and predominance of yellow occurs on the adjacent mainland. 1) Assuming that all of the salamanders are descended

Darwin's Theory

How did Darwin think that evolution occurred? There are 4 main points to his theory. State those four points and evaluate the evidence he used to support his idea. Also, please remember to approach the question from a scientific viewpoint, not a religious one.

Evolution and Antibiotic Resistance

I need to write an essay on the topic "evolution and antibiotic resistance", where can I get relevant information that has been published within the last 4 years? How should I approach this essay? Should I focus strictly on general facts or should I consider an illness and relate the subject of evolution and resistant antibiot

How organism size changes are related to evolution

The evolutionary pathways of some groups of related organisms seem to have moved from larger to smaller organisms over time, such as the glyptodont to the armadillo, the mammoth to the elephant. Yet other groups of related organisms have exhibited a trend of increased sizes of species over time, such as the tine eohippus to the

Summarize punctuated equilibrium.

What predictions about the fossil record does punctuated equilibrium make? In this model, what are the processes that produce rapid evolution? Which evolutionary factors are responsible for the periods of relative stasis? Patterns of punctuated equilibrium have been observed in some cases, but the debate between punctuated equil

How is Cultural Evolution Similar to Natural Selection?

The theory of natural selection has been applied to human culture in many different realms. For instance, there is a general belief in the United States that survival of the fittest determines which people are rich and which people are poor. How are the forces that produce differences in wealth among individuals like natura

Organ systems and evolution

Choose ONE animal species. Your goal is to describe the way in which an evolutionary change might occur for a particular characteristic (trait) of a population of that species as a result of natural selection. The characteristic (trait) could be something like coloration pattern, length of the limbs, size of the teeth or beak

Theory of Evolution and the Process of Natural Selection

According to the Theory of Evolution, Natural Selection is the mechanism by which evolution occurs. (Remember: evolution occurs at the level of the population. Individuals do not evolve, populations evolve.) The process of natural selection is based on the following four postulates Postulate 1 - Individual members o

Evolutionary changes is predicted.

Choose one animal species. Your goal is to describe the way in which an evolutionary change might occur for a particular characteristic (trait) of a population of that species as a result of natiral selection. The characteristic (trait) could be something like coloration pattern, length of the limbs, size of the teeth or beak,

Evolution and Genetics of Roses

We know that all modern roses were developed from the wild five-petal variety. Not only do modern roses have many more petals, but they have a much larger number of chromosomes. Explain how this probably came about.

Definition of Species

Define species. How important is phenotype in identifying species? Give a specific example. What is the problem for paleontologists in establishing species?

Sexual Dimorphism: Behaviour of Fish Experiment

Two recently discovered fish species, both found in waters off a small island. The two species are very similar in general structure, but there are two key differences between them. In species A, males are brightly patterned with blue, red, and purple scales, whereas the females are drab, and males are much larger than females.

How biodiversity and evolution are related

According to the theory of natural selection, variations in populations provide the raw material for evolution. Describe how the following variations allow for natural selection. A. Describe how natural selection results in biodiversity (200 words include references) B. Explain why biodiversity is important to continued evolut

The endosymbiotic theory of eukaryotic evolution.

An outline of the theory of endosymbiosis with a discussion as to what extent the theory can be used to account for the presence of chloroplasts and mitochondria in eukaryotic cells. The advantages in evolutionary terms of plant cells to possess both chloroplasts and mitochondria.

Evolutionary Aaptations for Terrestrial Life

Address the key evolutionary adaptations that arose as life colonized on land. What conditions on early Earth made it possible for life to develop? How have those adaptations and conditions influenced life on Earth as it is today?

Chemical Evolution Causing Life

For life to occur on europa what stages of chemical evolution must occur and the chemical and physical factors these require, if life is to emerge from europa.

Evolution is considered.

1. What role have the numerous mass extinctions played in the evolutionary history of life of earth? 2. Among Mary's many contributions to evolution and evolutionary theory is the biological species concept - probably the most widely accepted "definition" of a species that we currently possess. What is the biological species

Discussing Evolutionary Terms

These issues are embedded: 1. Define macroevolution, coevolution, convergent evolution and mosaic evolution. 2. Why is adaptation so important to evolution?

Evolution explained in this solution

1. Natural selection is not only known mechanism which drives evolution. Other mechanisms include genetic drift, sexual selection, artificial selection, group selection (inclusive fitness) and the neutral theory. Briefly explain how each of these "alternate" evolutionary mechanisms functions. 2. A variety of mechanisms have b