“There is no way a mother can provide more than 50% of the non-sex-determining chromosomes that are paired.”
Actually, there are ways, but that was not the issue. The article is about a child whose legal father is his biological brother. And once again, it is possible that the child will have none of his legal father’s genetic material, but that is about as unlikely as having 50%. It is much more likely he will have in the neighborhood of 25%. And the exact amount cannot be determined, as it is random.
And I’m not quite sure the relevance of bringing up dominant and recessive traits in all of this. We were talking about genes, not phenotypes.
I thought the diagram I gave you would have clarified this.
It was my understanding that when chromosomes pair up, one half of each pair comes from the father, and the other half, from the mother. Can one chromosome from the mother pair with another chromosome, from the same mother?