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Genetic polymorphism occurs as a result of natural selection. It represents an equilibrium between members of the same species, and makes use of balancing selection for conservation.
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What do biologists use to establish whether or not two organisms are of the same species?
Comparisons of appearance, comparisons of structure, and comparisons of DNA and proteins.
Two different species of mosquito have different body structures. Both of these species have DNA that tell their bodies how to grow. How can DNA produce two very different species?
different organism have dna with nucleotide base in a different order
The more similar the DNA sequences of two species are the more closely related the species are?
Since all organisms have the same DNA, just different amounts and sequences, the more similar the sequences, the more closely related the organisms.
How are animal DNA and human DNA different?
The DNA is the same chemical. The instructions coded for by the DNA (the proteins cells make using it) are however slightly different for every individual in a species and there are more differences between species.
Do the DNA in animals follow the same base pairing rule as DNA in plants?
No; nearly all organisms use the same 4 nucleotide bases in DNA (RNA uses Uracil instead of Thymine in DNA). I believe there is a single species of bacteria that uses a different base, but other than that, every single living being uses the same 4 DNA bases: Adenine, Cytosine, Guanine, and Thymine. What differs is their specific sequence.
What do biologists use to establish whether or not two organisms are of the same species?
Comparisons of appearance, comparisons of structure, and comparisons of DNA and proteins.
Why is DNA analysis suck a good tool for classifying organisms?
The knowledge of DNA makes for more accurate classification of organisms because the scientists can examine certain species of organisms and see if there are related or closely related to determine weather or not they can be classified in the same group or not.
Could DNA extracted from onion be different from DNA extracted from cauliflower why?
Although DNA is composed of the same four nucleotides in all organisms, the sequence of nucleotides is different for each species
How do you differentiate between DNAs of two different organisms?
No two organisms have identical DNA, It depends on the molecular marker and species, DNA fingerprinting is a technique that is used to identify patterns that occur in DNA. One of the method consist using Restriction enzymes. Restriction enzymes always cut at the same base sequence. Because no two individuals have identical DNA, no two individuals will have the same length fragments. Different species of organisms have different proportions of bases.
Why do you think that it is important that the structure of DNA is the same in all organisms?
DNA is the same in all organisms because we are basically animals
How is polymorphic DNA used for identification purposes?
Polymorphic DNA is a stretch or multiple stretches of DNA that have high variability among individuals. Since the chance of DNA being different among these stretches in two different people, these pieces of DNA are commonly used for identification purposes.
Does DNA have same basic structure from all organisms?
Yes. The basic structure of DNA is universal for all organisms.
How do birds and dogs both use DNA as instruction for building their bodies even though they are very different organisms?
Their DNA has the same nucleotide bases, but in different patterns. DNA forms the building blocks of all living things, regardless of species.
How do birds and dogs both use DNA as instructions for building their bodies even they are very different organisms?
Their DNA has the same nucleotide bases, but in different patterns. DNA forms the building blocks of all living things, regardless of species.
Does DNA look the same in all organisms?
a
How do biologist classify organisms?
In basic terms: biologists classify organisms by species, genus and family.
What types of DNA do scientists use to determine individual identities of organisms within the same species?
Single nucleotide polymorphisms (SNPs) and short tandem repeats (STRs)
