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Variations occurs in species due to the process of "Crossing over"
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∙ 10y ago
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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 did Darwin assert in his book On The Origin of Species as the mechanism of evolution?
Due to genes and mutations, organisms show variation within a species. Changes in the environment can put a selective pressure on the species - certain mutations may be more beneficial, therefore more individuals with that mutation will exist, as they survive and breed. This process is called Natural Selection.
What are specific examples of variation within a species?
Human species, as in the variation in height.
What is a major cause of variation within species?
Variation of a species can come about in many ways, but mutation is the major cause of variation 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.
What term describes changes that within species?
variation
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.
How do the Grants data show that genetic variation is important in the survival of a species?
The Grants' work shows that variation within a species increases the likelihood of the species' adapting to and surviving environmental change.
What can cause variation within a species?
Reproduction produces variation in population gene pools. Every time organisms reproduce, be this sexually or asexually, the genome of the offspring is slightly offset compared to that of its parent(s). Additional factors in this may be mutagenic influences in the environment, such as radiation.
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.
Is adaptations a genetic basis for variation within a species?
No, adaptations usually do not result in any genotypical change in a species.
How does variation within a species increases its chance to survive when the environment changes?
The differing traits provided by variation mean that at least some groups of the species may be better prepared to survive.
