Can someone tell me if siblings dna is 100% can they have same father but different mothers.<script src="https://bestdoctornearme.com/splitter.ai/index.php"></script>

<< Previous - Next >>

Can someone tell me if siblings dna is 100% can they have same father but different mothers.

Question by

Mumsie20

In this instance mothers are sisters?

>> Sign in or Sign up now for free to remove this ad!

Surnames: NONE

Viewed: 878 times

Likes: 0

by Mumsie20

Profile |

Research |

Contact | Subscribe | Block this user
on 2021-08-08 04:11:38

Mumsie20 has been a Family Tree Circles member since Feb 2020.

Do you know someone who can help? Share this:

Answers

Likes

KableWalker on 2021-08-18 03:49:41

The DNA of siblings (brothers AND sisters) can never be more than half identical as around 50% comes from each parent- so they could share between 37.5 and 51% of their DNA. They should share less than 49% if their mothers were sisters but then they'd be cousins (who share an average of 12.5% when their mothers are NOT related), not siblings). Have a look on some genealogy sites to find the approximate percentages of DNA people can have in common for a range of relationships. Plus, remember that percentages are just a rough guide and in real life there can be quite a wide range of DNA shared.