There's practically no problem.
Practically, i won't. But it is not desirable, To create a healthy generation, it is better not to have a kinship.
I guess after first cousins there's no problem, but you better talk to a gynecologist or a doctor.
No, your fears are based on myths and legends.
In most cases, there is no danger of genetic defects greater than that in a "normal" pair. However, the risk increases dramatically if there is a similar tradition in the family. The Habsburgs and Plantagenets have moved to the point where they have given birth to monstrous deviations.
What do the numbers say? Brother and sister have 50% common genes. This leads to a very high risk of degenebrities in a generation of such close relatives.
First cousins have 12.5% common genes and the risk is very small, but still higher than average.
Second cousins have 3.1% common genes. This is considered insignificant.
Every couple is threatened by some kind of genetic defect in the generation. The normal percentage is 3, while for a generation of second cousins the percentage is 3, 5, which is in the statistical error. First cousins, the percentage is between 4 and 6.
The data is from The Stanford Wrap.
Grandpa The Boogeyman
Give it to him! You're satisfying your people, but don't make offspring! The risk of having children with... health problems is quite large.
In fact, you have a kinship along a collateral line. From what I understand these things, and I'm not a specialist, the degree should fall to 5 or 6, which already enters a safe zone. Relatives up to the 4th knee (first cousins) have a problem with love with each other, from there on it is not so scary from a legal and biological point of view, about morality we will not talk. But the genes are already scrambled enough that it doesn't matter much and doesn't lead to genetic abnormalities in the baby.
I don't know, but there was one case in the village- second cousins wanted to get married. They went to some tests to see if their future child was at risk of having abnormalities. It turned out to be a small risk, but they fried themselves anyway.
How old are you and how old is he, or at least a age difference? It's a weird thing. Are you in the minority that here next to me is a friend... for him I ask these things :)
1 christy_love answered