telegony

In biology, the supposed influence of a first sire upon the progeny subsequently borne by the mother to other sires. Most breeders are believers in telegony, although careful experiments have failed to show any scientific basis for their opinion.

The supposed influence of a father upon offspring subsequent to his own, begotten of the same mother by another father.

The belief that in the case of siblings from the same mother but different fathers the second sibling could inherit characteristics from the father of the first