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How are differences between DNA amino acid sequence used to show relatedness between species?
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∙ 12y ago
the acid burns the fats
Wiki User
∙ 12y ago
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Which of the following are responsible for the differences between species and for differences between individuals in the same population?
Genetic differences
Is it possible that two prokaryotic organisms show phenotypic similarities but do not share close evolutionary relatedness?
It is possible that two prokaryotic organisms may look alike, phenotypic similarities, but still have major genetic differences, genotypic dissimilarities, that would indicate that they are not closely related. For example if two prokaryotic organisms share 97% of their rRNA gene sequence then they are considered to have the probability of being in the same species. However, even if two prokaryotic organisms share less than 95% of their gene sequence then they will be considered a new species and therefore they would not be related even if 95% of their gene sequences match therefore not sharing close evolutionary relatedness.
How does the variation in protein reflect changes in a species DNA?
As new species evolve they build up differences in the DNA from related species, as a result of mutation and selection. The role of DNA is to encode the structure of proteins. The DNA code defines the sequence of amino acids in each protein. So if the sequence of bases in the DNA changes, the sequence of amino acids in the proteins can also change as a result. If we compare closely related species there should be fewer differences in their DNA and so fewer differences in their proteins than between distantly related species. By comparing amino acid sequences we can therefore estimate how closely or distantly related two species are to each other. (see related links)
What are the differences in inherited traits between members of a species called?
variations
What is phylogenetic relatedness?
Recency of common ancestry. Species A is more closely related to species B than to species C if (and only if) the last common ancestor of A and B lived more recently than the last common ancestor of A and C. The concept can be applied not just to species but also to organism, populations, or genes.
What determines the degree of relatedness between two different species?
The degree of relatedness between two different species can be determined by taxons and a classificaton system. The classification system is used to organize things into different categories based on their evolutionary relationships.
What determines the relatedness between two different species?
whatever the dicoythamus key says is the difference
Which of the following are responsible for the differences between species and for differences between individuals in the same population?
Genetic differences
What are species that share a very distant common ancestor?
have few amino acid sequence differences.
Is it possible that two prokaryotic organisms show phenotypic similarities but do not share close evolutionary relatedness?
It is possible that two prokaryotic organisms may look alike, phenotypic similarities, but still have major genetic differences, genotypic dissimilarities, that would indicate that they are not closely related. For example if two prokaryotic organisms share 97% of their rRNA gene sequence then they are considered to have the probability of being in the same species. However, even if two prokaryotic organisms share less than 95% of their gene sequence then they will be considered a new species and therefore they would not be related even if 95% of their gene sequences match therefore not sharing close evolutionary relatedness.
What is the Accumulation of differences between species?
Organism
In what two ways G C content data are taxonomically valuable?
It has been observed that there is a correlation between GC content and relatedness between species. This means there is a similarity in GC content in closely relates species. And since taxonomy is involved with classification of organisms, GC contect is an excellent indicator of relatedness. Using this technique, the classification process can be made more precise
How does the structure of macromolecules such as proteins act as an index of relatedness between species?
Organic molecules that just so happen to weigh more than 100,000 daltons, are from that point on then referred to as macromolecules which is related between the species.
How does the variation in protein reflect changes in a species DNA?
As new species evolve they build up differences in the DNA from related species, as a result of mutation and selection. The role of DNA is to encode the structure of proteins. The DNA code defines the sequence of amino acids in each protein. So if the sequence of bases in the DNA changes, the sequence of amino acids in the proteins can also change as a result. If we compare closely related species there should be fewer differences in their DNA and so fewer differences in their proteins than between distantly related species. By comparing amino acid sequences we can therefore estimate how closely or distantly related two species are to each other. (see related links)
What word is used to describe differences between organisms?
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Differences that occur between members of a species?
It is called variations
What word is used to describe the differences between animals of same species?
Sub species , varieties .
