November 2016 | DNA Encyclopedia

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 »

AncestryDNA

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 history, essentially, who and where they are descended from. Many people want to know this information for their personal interest, especially… 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 »

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