A second cousin is a person with whom you share great-grandparents. In other words, your parents' cousins' children are your second cousins. To calculate the degree of relationship between you and your second cousin, count back two generations from yourself to your great-grandparents, then count forward two generations to your second cousin.

Here's a simplified explanation of how the relationship works:

1. Start with yourself.

2. Move up one generation to your parent.

3. Move sideways one generation to your parent's sibling (your aunt or uncle).

4. Move down one generation to your parent's sibling's child (your first cousin).

5. Move sideways one generation to your first cousin's sibling (your second cousin).

Second cousins share approximately 1/32 of their genes, which is the equivalent of sharing a great-grandparent. While this may seem like a small percentage, it's important to remember that even small genetic connections can have a significant impact on physical traits and personality characteristics.

Understanding the concept of second cousins helps in comprehending family dynamics and genealogy. Knowing your second cousins can broaden your extended family network and deepen your understanding of your family tree.