Wikis | DNA Encyclopedia

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 »


Contents1 What is AncestryDNA?2 How does it work?3 What information is provided?4 How accurate is it?5 The future of Ancestry DNA What is AncestryDNA? 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 their ancestral… 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 »

What are proteins and what do they do?

Proteins are an incredibly important and diverse group of molecules. They’re everywhere, and every living organism needs them to survive. In fact, if you were to take some cells from any organism and remove all the water from them, over 50% of the remaining weight would be protein. There are millions of different proteins, which… read more »

RNA vs DNA – the Differences

Nucleic acids such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are large biological molecules that are the foundation of life.  Our genetic code comes from DNA. Mutations or damage to DNA contributes to serious complications in genetic code. Contents1 Function2 Structure3 Stability4 Replication5 Genetic mutations6 Conclusion7 References Function RNA translates the proteins that keep us… read more »

DNA Polymerase

Contents1 What is DNA polymerase?2 Where is DNA polymerase?3 How does DNA polymerase work?4 What does DNA polymerase look like?5 What if DNA polymerase makes a mistake?6 How can DNA polymerase be used in science? 7 References What is DNA polymerase? DNA Polymerase is the molecule responsible for making a copy of every cell’s genome…. read more »