Medical Facts

Medical Facts

The health of first-degree relatives --your parents, siblings, and children--is always most key to your medical history, since you share 50 percent of your genes with them.

Grandparents, aunts, uncles, nieces, nephews, and grandchildren are second-degree relatives; you have 25 percent of your genes in common, so their wellness may be relevant to yours, but to a lesser degree.

First cousins are third-degree relatives and you share just 12.5 percent of genes, so the association is even weaker.
Source: HEALTH.COM