Definicja i Znaczenie "blood will tell"

What is the origin of the proverb "blood will tell" and when to use it?

The proverb "blood will tell" suggests that a person's family background or genetic traits will influence their behavior, character, or abilities, often revealing themselves despite any attempts to hide them. Its origin is linked to ancient beliefs about heredity, emphasizing that family traits or qualities are often passed down and remain evident in individuals. The saying is used to highlight how a person’s origins can have a strong impact on who they are, regardless of other factors.