* "His love for the outdoors, a clear atavism from his grandfather who was a renowned explorer, led him to pursue a career in wildlife conservation." (This sentence highlights the inherited trait from a past generation.)
* "The sudden appearance of a tail-like appendage on the newborn was a startling atavism, suggesting a distant ancestor with a more reptilian lineage." (This sentence describes a physical trait that is a throwback to an earlier evolutionary stage.)
* "The political party's platform, with its focus on isolationist policies, seemed like an atavism to the days of pre-globalization." (This sentence uses "atavism" to describe an idea or belief that is reminiscent of a past era.)
Let me know if you'd like more examples or would like to see the word used in a different context!