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variation within species can be found in all the species. The differences we see between individuals in a species are affected by five processes, usually acting in combination with one another:
1. Mutation- these are changes in the genetic structure occurring through breaks in DNA, errors in copying or changes in sequence. This is the ultimate source of all variation.
2. Selection is a force which decreases an individuals ability to reproduce. For example, genetic variation in the ability of a tree species to survive severe drought may cause some individuals to die while others survive and reproduce. An event like this may decrease the overall diversity of genes (alleles) in a population but a change in the overall genetic makeup of the population is produced.
3. Migration is the movement of genes into or out of a population. This includes pollen or seeds blowing into the population from a source that is otherwise considered to be a separate population.
4. Random drift is a chance event unconnected with the genetics of an individual that affects the ability to reproduce. Random drift can be thought of as "dumb luck." A lightening strike or animal damage that kills a tree which is not directly related to the tree's genetic makeup can be thought of as random drift.
5. Nonrandom mating reflects the fact that some individuals in a population are more likely to mate with one another than others in the population. In a forest, a tree's flowers are more likely to be fertilized by nearby individuals.
What else can I help you with?
Which process produces the most variation within a species?
Variations occurs in species due to the process of "Crossing over"
What causes variation within a species?
It has adaptations
Variation exists within the genes of every population or species as the result of what?
Variation exists within the genes of every population or species as the result of natural selection. The other reason is due to neutrality of mutations.
What is phenotypic variation?
Phenotype variation is slight variations in a phenotype that are caused by the expression of an organism's genes or the influence of environmental factors. A species can have several different phenotypes within it.
Discuss how 1 variation within a species 2 geographically isolated populations and 3 fossil organisms make it difficult to clearly define a species?
what is this, your homework? yes and its hard.
What are specific examples of variation within a species?
Human species, as in the variation in height.
Which process produces the most variation within a species?
Variations occurs in species due to the process of "Crossing over"
Is mango leaf a parallel variation?
No, mango leaf is not considered a parallel variation. Parallel variation refers to easy and reversible changes within a species or population, while mango leaf characteristics are part of the natural variation within the species.
What is a major cause of variation within species?
Genetic variation, caused by mutations in DNA, is a major source of variation within species. Mutations can lead to differences in traits such as color, size, and behavior, allowing for natural selection to act upon these variations.
What causes variation within a species?
It has adaptations
Variation exists within the genes of every population or species as the result of what?
Variation exists within the genes of every population or species as the result of natural selection. The other reason is due to neutrality of mutations.
What did Charles Darwin say about variation within species?
Because there is variation within a species, it is therefore possible for the law of natural selection to operate, by selecting those variations which best enhance survival and reproduction.
What is phenotypic variation?
Phenotype variation is slight variations in a phenotype that are caused by the expression of an organism's genes or the influence of environmental factors. A species can have several different phenotypes within it.
Does variation within the same species exist?
Of course, variation exists within individuals of the same species. This is because there are a small minority of genes which have multiple alleles in most species. In cases where a subset of the population is isolated from the rest of the population, a subspecies may develop which has particular unique characteristics but can still interbreed with the rest of the species.
Is adaptations a genetic basis for variation within a species?
No, adaptations usually do not result in any genotypical change in a species.
Explain why there is more variation between a species than within a species?
Within a species, the animals breed together so that the similar characteristics are passed from parents to their offspring. This is why there is less variation within a species than between a species.
How variation within the species enabled evolutionary change to happen?
To make a long answer short, when a variation helps an animal survive in its habitat, that animal will become more successful than it used to be, and enough variation can lead to a new species.
