# Understanding daughter’s 314 centimorgans with half nephew

## How many centimorgans does a half niece share?

Your half niece and you would share between 500-1446 cM, according to the Shared cM Project.

## How many cMs does a half nephew share?

Percent DNA Shared by Relationship

Relationship Average % DNA Shared Range
Identical Twin 100% N/A
Parent / Child Full Sibling 50% Varies by specific relationship
Grandparent / Grandchild Aunt / Uncle Niece / Nephew Half Sibling 25% Varies by specific relationship
1st Cousin 12.5% 7.31% – 13.8%

## How would a half sibling appear on ancestry DNA?

Half-siblings on Ancestry DNA will show up as “Close Family” or “First Cousins” and are expected to share an average of 1,759 centimorgans with a range of 1,160-2,436 centimorgans, according to data from the Shared Centimorgan Project.

## What percentage is half siblings?

25%

Half siblings share 25% of their DNA, but so do an uncle/nephew or a grandparent/grandchild.

## How many centimorgans is significant?

For example, you’ll usually share about 120 centimorgans with a 3rd cousin, but it’s possible to share as few as 90 or as many as 200.
What does the match confidence score mean?

Approximate amount of shared DNA (in centimorgans) Possible relationship
200—620 2nd cousin
90—180 3rd cousin
20—85 4th cousin
6—20 Distant cousin: 5th cousin — 8th cousins

## How many centimorgans is a good match?

Centimorgans (cM) are units of genetic linkage between two given individuals. For example, if you share 1800 cM with an individual, that means you share around 25% of your DNA with them. A strong match will have around 200 cM or more.

## How much DNA would you share with a half aunt?

Average Percent DNA Shared Between Relatives

Relationship Average % DNA Shared
Grandparent / Grandchild Aunt / Uncle Niece / Nephew Half Sibling 25%
1st Cousin Great-grandparent Great-grandchild Great-Uncle / Aunt Great Nephew / Niece 12.5%
1st Cousin once removed Half first cousin 6.25%
2nd Cousin 3.13%

## How many CMS do half siblings share?

The amount shared is usually expressed in something called centimorgans. Full siblings tend to share around 3500 centimorgans while half siblings share closer to 1750.

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