cM and Shared DNA: CentiMorgans Explained

The purpose of this video is to discuss and explain the “Shared DNA” measurement “cM” (CentiMorgan) used by ancestral DNA testing companies & genetic genealogists to determine how closely related you are to each “Match”.

Chapters:
00:00 Introduction: Why did you get your DNA tested? / Waiting for results
00:34 Match Listings: How are they displayed by different testing companies?
01:05 What cM does and doesn’t stand for when measuring shared DNA?
02:32 What is a centiMorgan?
03:08 Thomas Hunt Morgan: Chromosome Mapping, Recombination, Crossovers & Probability
06:13 The Morgan and centiMorgan defined
07:54 How is the number of centiMorgans (cM) you share with a DNA Match calculated?
14:46 What is the total length of all your DNA in centiMorgans (cM)?
17:09 Chromosome Browser: Mapping each segment of DNA you share with your matches to their locations on the chromosomes
17:36 Wind Up & End Credits

The above “Chapters” list matters covered and clickable links to the time in the video where I begin discussing that matter.

My main sources of material and information for this video were:
- Ancestry DNA
- Family Tree DNA
- My Heritage
- Living DNA
- NCBI (National Center for Biotechnology Information)
- Wikipedia
- ISOGG Wiki (International Society of Genetic Genealogy Wiki)

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Видео cM and Shared DNA: CentiMorgans Explained канала DNA Lives Forever