Wikis | DNA Encyclopedia

What is CRISPR-Cas9?

CRISPR-Cas9 is a technology that can be used to edit parts of the genome of organisms. This can be done by either adding, removing or altering parts of the genome. At the current moment in time, CRISPR-Cas9 is the simplest and most precise method of editing the genome that is available. It is cheaper and… read more »

What is gel electrophoresis?

Gel electrophoresis is a method whereby molecules can be separated and analyzed. The molecules that can be separated by gel electrophoresis are DNA, RNA, and proteins, as well as any fragments of these molecules. These molecules are all types of a macromolecule, which is the name for large molecules such as these and carbohydrates and… read more »

Mitosis and meiosis – the differences

Mitosis and meiosis are the two forms of cell reproduction that occur in living organisms. They are the only two ways that new cells can be created. They work through the process of cell division – one cell splits into two (in mitosis) or four (in meiosis) identical cells, known as daughter cells. Mitosis and… read more »

What Are Dominant and Recessive Alleles?

Dominant and recessive alleles are how we describe the traits passed down through inheritance.  This occurs only when an organism sexually produces.  Each parent passes down one-half of the genetic information, and those combinations make up our specific genetic code.  That specific genetic code is the genotype.  What can be seen, or the physical differences… read more »

What Are Single Nucleotide Polymorphisms?

Single Nucleotide Polymorphisms or SNPs are a single nucleotide change in an area of an organism’s DNA that is different in more than 1% of the population. SNPs occur in the DNA in 1 out of every 300 nucleotides. In the human genome, this means that there are at least 1 million SNPs in the… read more »

Ancestry DNA

Contents1 What is Ancestry DNA?2 How does it work?3 What information is provided?4 How accurate is it?5 The future of Ancestry DNA What is Ancestry DNA? AncestryDNA is a company that offers genealogy testing. They test their customers’ DNA and use the results from this to provide information about their genealogy. A person’s genealogy is… read more »

How Long Is A Generation?

We here people use the word generation a lot. There is the lost generation, generation X, generation Y, and the millennial generation. But in all of that, there is no defined sense of time as to who or when these terms apply. To genealogists, geneticists, and other researchers the word generation needs to be clearly… read more »

What is meiosis?

Meiosis is one of the two types of cell division. It only occurs during the production of sex cells, which are called gametes. One cell, after undergoing meiosis, produces four cells, which each have half the number of chromosomes as the dividing cell. These are haploid cells, as opposed to diploid cells, which have the… read more »

What is mitosis?

Mitosis is one of the two types of cell division. It is the way cells in the body reproduce and is what is responsible for all your cells. It is used to grow and to replace old cells. During the process of mitosis, all the cell’s contents are copied and the cell splits into two… read more »

What is a gene?

Gene is a heredity unit of life at a molecular level. It represents a specific set of nucleosides at a particular region/locus on the DNA[1,2]. Each trait that appears in an individual is representative of a particular gene or set of genes. Usually, the traits are represented by polygenes (multiple genes). Contents1 Definition2 Genome 3… read more »