Sequence of which of the following is used to know the phylogeny?? A. mrna B.rrna C.trna D. DNA?

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Answer

Answer

Study of evolutionary change or development on the basis of the DNA is called as phylogeny. According to the Carl woese  R-rna  are commenly recommend as molecular clocks to the phylogeny.

Answer

To know the phylogeny, scientists use DNA sequencing techniques. DNA sequencing is the process of determining the order of nucleotides (A, T, G, C) in a DNA molecule. It provides valuable information about the genetic makeup of an organism, which can be used to study evolutionary relationships and construct phylogenetic trees.

DNA Sequencing:

DNA sequencing involves determining the precise order of nucleotides in a DNA molecule. There are different methods of DNA sequencing, such as Sanger sequencing, next-generation sequencing (NGS), and third-generation sequencing. These techniques allow scientists to read the DNA sequence and compare it with other organisms to understand their evolutionary relationships.

Importance of DNA:

DNA is the genetic material that carries the instructions for the development, functioning, and reproduction of living organisms. It contains information that is passed from one generation to another. Therefore, DNA is an excellent molecule to study when trying to determine the phylogeny of different organisms.

DNA as a Molecular Clock:

DNA can act as a molecular clock, providing insights into the timing of evolutionary events. Over time, DNA accumulates mutations at a relatively constant rate. By comparing the number of differences in DNA sequences between different organisms, scientists can estimate the time since they shared a common ancestor.

Comparison of DNA Sequences:

To determine the phylogeny, scientists compare the DNA sequences of different organisms. By aligning the DNA sequences and analyzing the similarities and differences, they can infer the evolutionary relationships between species. The more similar the DNA sequences, the more closely related the organisms are believed to be.

Different Types of DNA:

1. mRNA (messenger RNA):
mRNA carries the genetic information from DNA to the ribosomes, where it is translated into proteins. While mRNA can provide information about gene expression, it is not commonly used for phylogenetic analysis.

2. rRNA (ribosomal RNA):
rRNA is a component of the ribosomes, which are responsible for protein synthesis. rRNA genes are highly conserved among different organisms, making them useful for studying evolutionary relationships. They are commonly used in constructing phylogenetic trees.

3. tRNA (transfer RNA):
tRNA molecules help in the translation of mRNA into proteins. Although tRNA sequences can be informative for studying small-scale evolutionary events, they are not widely used for phylogenetic analysis.

4. DNA (genomic DNA):
Genomic DNA refers to the complete set of DNA present in an organism's genome. It includes both coding and non-coding regions. Genomic DNA is the most commonly used type of DNA for phylogenetic analysis as it provides a comprehensive view of an organism's genetic makeup.

Conclusion:

In summary, DNA sequencing is used to know the phylogeny of different organisms. By comparing DNA sequences, scientists can determine the evolutionary relationships between species. While different types of DNA, such as mRNA, rRNA, tRNA, and genomic DNA, have their own roles in gene expression and protein synthesis, genomic DNA is the most commonly used for phylogenetic analysis due to its comprehensive nature.

Answer

Dna is genetic material

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