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What is variation in evolution?

Updated: 8/11/2023
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10y ago

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A variation of a gene is called and allele.

Different alleles are caused by mutations.

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13y ago
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9y ago

Variation in the terms of genetics is the variation in alleles. Genetic variation comes about by mutation and is important for natural selection.

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10y ago

Variation is the differences between two organisms of the same species. This can be caused by mutations, gene flow, and sexual reproduction.

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Q: What is variation in evolution?
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Mutations are a source of what in a species?

Genetic variation, which can lead to evoloution, and then potentially a new species.


Explain the role of variation in evolution?

Variation plays a role in the process of natural selection because it keeps things mixed up. This is necessary so that one thing doesn't overtake another, ruling it out. If things are equal, one can't overrule another.


What is genetic variation measured with?

Variation of quantative characters such as littersize and lifetime reproductive output. Variation in protein sequence. Variation in the non-coding regions of DNA


What increases genetic variations?

A large population increases genetics variation. Mutation will also increase genetics variation.


What tends to increase genetic variation in a population?

Genetic variation is the total amount of genetic diversity present within a species or population. The amount of genetic variation in a population will depend on a variety of factors, including the size of the population, the type of reproduction, and environmental influences. The primary way to increase genetic variation in a population is through mutation. Mutations are random changes in the genetic code that can lead to new traits or characteristics. Mutations can be caused by environmental factors, such as exposure to radiation or chemicals, or they can occur spontaneously. Mutations can be beneficial, neutral, or detrimental to the organism, but they do lead to increased genetic variation. Another way to increase genetic variation in a population is through migration. When individuals from different populations mate, they bring with them different alleles from their home population, increasing the genetic diversity of the new population. This is especially important for populations that are geographically isolated, such as island populations. Another factor that can increase genetic variation is sexual selection. This is the process by which individuals select mates based on certain desired traits. This can lead to an increase in the number of different alleles in the population, as individuals with certain traits will be more likely to reproduce. Finally, gene flow is a process that can increase genetic variation in a population. Gene flow is when individuals from one population move to another population and mate with individuals in the new population. This can bring in alleles from the original population, increasing the genetic diversity of the new population. Overall, while mutation, migration, sexual selection, and gene flow are all important factors in increasing genetic variation in a population, it is important to note that genetic variation can also be decreased by inbreeding and genetic drift. Inbreeding is when individuals mate with close relatives, reducing the number of alleles in the population and leading to decreased genetic variation. Genetic drift is when random fluctuations in allele frequencies occur due to a small population size, leading to decreased genetic variation. Therefore, it is important to consider all of these factors when trying to increase genetic variation in a population.