How can DNA be used to determine relatedness of different species?

Answer 1

DNA is used to determine the relatedness of a species by checking the different sequences (genes) and comparing them. Scientists have embarked on the Human Genome Project, which aims to link a trait to each gene in human DNA. To compare these genes to a chimp's DNA would yield a large percentage of similar genes.

Answer 2

this is only to explain how dna analysis determine the relatedness

Assume that type O blood is found at the crime scene. Type O occurs in about 45% of Americans. If investigators type only for ABO, then finding that the "suspect" in a crime is type O really doesn't reveal very much.

If, in addition to being type O, the suspect is a blond, and blond hair is found at the crime scene, then you now have two bits of evidence to suggest who really did it. However, there are a lot of Type O blonds out there.

If you find that the crime scene has footprints from a pair of Nike Air Jordans (with a distinctive tread design) and the suspect, in addition to being type O and blond, is also wearing Air Jordans with the same tread design, then you are much closer to linking the suspect with the crime scene.

In this way, by accumulating bits of linking evidence in a chain, where each bit by itself isn't very strong but the set of all of them together is very strong, you can argue that your suspect really is the right person.

With DNA, the same kind of thinking is used; you can look for matches (based on sequence or on numbers of small repeating units of DNA sequence) at a number of different locations on the person's genome; one or two (even three) aren't enough to be confident that the suspect is the right one, but four (sometimes five) are used and a match at all five is rare enough that you (or a prosecutor or a jury) can be very confident ("beyond a reasonable doubt") that the right person is accused.

Answer 3

Let's say you have two books, one in Spanish, another in Portuguese. The one is one species, the other one is the other species. They are more similar in relation whit one another than, for example, than a book in German.
So, the more differences between two DNA samples, the more separated they are and the opposite.
Cheers!!!

Answer 4

The more alike the DNA sequence of bases is, the more closely related the species are.

Answer 5

greater junk DNA is used for connection of species than something. It on no account implies branching from a undemanding ancestor, it implies a number of opportunities advent and evolution are purely 2 of them. no matter how a species adapts to this is environment speciation has on no account been reported. a working laptop or computing device isn't organic you moron somebody courses it. a working laptop or computing device programmer might desire to easily as particularly set a working laptop or computing device as much as refute evolution. each and every thing you stated right it is purely as particularly used for evidence of advent. and finally i do no longer settle for evolution because of the fact it claims to be technological information although this is not testable, observable or repeatable. This makes it speculative "technological information" which isn't technological information in any respect. Macro-evolution is at terrific wager artwork and at worse a fraudulent declare without foundation.

Answer 6

By usin a technique call RLFP'S, that determines the identity of the pair of bases.,, using the restriction enzymes.,
commonly is used the mDNA ( mithocondrial Dna) because is necessary use a DNA whith a high rate of mutations or a known rate of mutation