How exactly do people of mixed race have stronger genetics?

They don't technically have stronger genetics—but they do have genes that come from two very different parts of the world, different enough that the people in those parts of the world are now socially defined as having come from different races. read more

Most disorders caused or affected by genetics are not single-gene disorders that are as simple to explain as Tay-Sachs. Regardless, because they are far less likely to get matching copies because their parentage is so diverse, mixed-race people tend to do better in the genetic lottery than most of us. read more

Humans have 23 pairs of chromosomes containing about 30,000 genes. Only the sex chromosomes break the ‘pairs’ rule, women having two ‘X’ chromosomes and men one ‘X’ and one ‘Y. If you carry two copies of a gene that differ slightly in how they work, it is a bit like having an extra channel on your TV set: you don’t have to watch it but there may be times when the extra channel comes in handy. read more

This is called “hybrid vigor” or outbreeding enhancement and it likely results from a lower probability of a deleterious combination of genes. read more

They don’t technically have stronger genetics—but they do have genes that come from two very different parts of the world, different enough that the people in those parts of the world are now socially defined as having come from different races. The benefit that mixed-race folks have is greater genetic variety. read more

That depends on what you mean by better genes. There is a lower chance of Sickle Cell Anemia, MCAD, and a few other genetic disorders when a black person marries a person of another race, because those disorders are more common in specific ethnic groups. read more