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Do Species that share a distant common ancestor have identical nucleotide sequences?
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Are no two nucleotide sequences in DNA molecules ever the same?
Yes. This can happen via a gene duplication in a single organism or by shear coincidence (though its increasingly unlikely the biggest the sequence in question). Identical sequences can happen across species due to heredity from a common ancestor of a common gene or genetic marker, such as we see in ERVs and analysis from computational genomics.
Closely related species show more in nucleotide sequences than distantly related species?
similarity
When comparing cytochrome sequences among species what species is identical to humans?
Chimpanzee
When comparing cytochrome sequences among species, which of the following species is identical to humans?
Chimpanzee
How would you know if organisms shared a common ancestor?
The closer the DNA pattern (the nucleotide base pairing), the closer the species from a common ancestor.
Which term refers to a similar structures that related species have inherited from a common ancestor?
DNA sequences
Two nucleotide sequences found in two different species are almost exactly the same This fact suggests that these two species probably?
May have similar evolutionary histories
DNA varies from species to species in its?
DNA varies from species to species in its nucleotide sequence, which determines the specific genetic information carried by each organism. This variation is what gives each species unique characteristics and traits. Additionally, differences in the organization and size of the genome also contribute to the diversity of DNA among species.
How do scientist estimate the number of nucleotide changes that have taken places in a gene since two species diverged from a common ancestor?
Both organisms' DNA is sequenced, and then compared to one another. The number of nucleotide changes is literally counted (though with a computer). It is an estimate because of genetic diversity within a species
What type of study is most appropriate for determining the time at which a common ancestor to humans and chimpanzees lived?
comparing DNA sequences between humans and chimpanzees Also,The more similar the DNA of two species, the more recently they diverged from a common ancestor
What does it mean when two species share a common ancestor?
An ancestor.
What is the best evidence that organisms of two different species share a common ancestor?
The best evidence that organisms of two different species share a common ancestor is the presence of homologous structures. These structures have similar features due to shared ancestry, even if they serve different functions in different species. Additionally, similarities in DNA sequences and developmental patterns can indicate a common evolutionary history.
