[2014] Alida Gervais: What is DNA?

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by judymaloney
Last updated 6 years ago

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Cell Biology

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[2014] Alida Gervais: What is DNA?

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DNA Structure

There are four types of nucleotides in DNA, differing only in the nitrogenous bases. They are Adenine, Guanine, Thymine, and Cytosine. In DNA, Adenine bonds with Thymine and Guanine with Cytosine. They can be joined together in any order, making any sequence of bases possible.................................................................................................................................................................................................................................................................................................

DNA stands for Deoxyribonucleic acid.It is made out of tiny things called Nucleiotides joined into long strands. Each Nucleiotide is made out of a 5- carbon sugar, a nitrogenous base, and a phosphate group. DNA also has a backbone made out of sugar-phosphate. The sugar is called ribose. To form the backbone, the sugar base of one nucleotide bonds with the phosphate group of another nucleotide.

What is DNA

Information on DNA and

History of DNA

Sugar-Phosphate Backbone

Every living thing has a set of characteristics inherited from it's parent or parents. Since the beginning of recorded history, people have wanted to understand how inheritance is passed down. In the 1860's,Gregor Mendel researched the study of heredity and genetics using pea plants.He founded the modern science of genetics. In the 1900's, people like Thomas Hunt began to study Mendel's work and make their own predictions about reproduction. Hunt spent a lot of time on genetic linkage like Mendel, but he went further on to study things like non-disjunction and chromosomal crossing over.There are still studies taking place today and many things are yet to be discovered.

DNA Replication

Before a cell can divide, it must duplicate its DNA. This ensures that the offspring will receive the same set of DNA. During DNA replication the two strands that make up DNA seperate or "unzip". Then following the rules of base pairing and the use of DNA Polymerase, new complementary bases pair with each "unzipped" side. These pairs create the rungs in the new DNA ladders.

I'm a doubleHelix

I share 50% of my DNA with humans

Nitrogenous Bases

By: Alida Gervais


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