Matching less than 6cM on Ancestry but almost 15cM at GEDmatch

What does 15 shared DNA mean?

15—50% You and your match might share DNA because of a recent common ancestor or couple, share DNA from very distant ancestors, or you may not be related. The amount of centimorgans you share with a match can also help you understand your relationship to them.

How many cM is a good DNA match?

A strong match will have around 200 cM or more.

What is a good DNA match on Ancestry?

Your AncestryDNA close family matches could include an aunt or an uncle, a niece or a nephew, a great-grandparent or a great-grandchild, a half-sibling, or a double-first cousin. Someone who appears in this category is rarely a first cousin.

How many centimorgans do half first cousins once removed share?

23andMe

Relationship Range in percentages Range in centiMorgans
1st cousin once removed; half first cousin 2% – 11.5% 149 cM – 855 cM
2nd cousin 2% – 6% 149 cM – 446 cM
2nd cousin once removed; Half 2nd cousin 0.6% – 2.5% 45 cM – 186 cM
3rd cousin 0% – 2.2% 0 – 164 cM

How many centimorgans do 1st cousins share?

You usually share about 850 cM with a first cousin, but that number could be as low as 553 or as high as 1,225 cM. Likewise, a single shared-cM value could indicate a variety of relationships. For example, 1,200 shared cM could indicate a first cousin, great-grandparent, grandparent, or great-niece.

How accurate is Gedmatch?

Gedmatch is not more or less accurate than 23andMe or Ancestry. It is simply different than those other websites because it does not perform DNA tests.

What does total cM mean on Gedmatch?

cM. Centimorgan (abbreviated cM) is a measure of genetic linkage. Think of it as a measure of DNA information within a chromosome. Each chromosome contains different amounts of information.

How much DNA do half siblings share in cM?

When it comes to full siblings, they share between 1,613 to 3,488 centimorgans (cMs) of DNA. For half-siblings, they will typically share anywhere from 1,160 to 2,436 cMs of DNA. In other words, you and your full siblings share 50% of your DNA while your half-siblings will share 25% of your DNA.

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