Male mice "record" the odor of their siblings during the first three weeks of life. When these mice reach sexual maturity, they avoid mating with their siblings. This is an example of

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This behavior is an example of imprinting, where the male mice learn and remember the scent of their siblings during a critical period in their development and use that information to guide their future behavior, such as avoiding mating with them. Fixed behavior refers to innate or instinctual behaviors, conditioning refers to learned associations between stimuli and responses, and altruism refers to behaviors that benefit others at a cost to oneself, none of which quite fit this example.

Male Mice "Record" the Odor of Their Siblings During the First