you might need to think about that again mate
No Saxon, you might want to think about that again. A child inherits 50% of its genes from each parent, so theoretically brother and sister could have no genes in common (if they each inherit the different 50% from each parent. There is more chance of me winning the lottery but it is still a chance). This would give the offspring of a brother sister mating an inbreeding coefficient of 0%. However, the inverse is also true, and the offspring of a brother sister mating could have an inbreeding coefficient of 100%.
Assuming the ori