Cloned Black-Footed Ferret Birth Case Study

This set of flashcards covers the vocabulary and key figures regarding the historic birth of offspring from Antonia, a cloned black-footed ferret, and the conservation science behind the event.

Antonia

A cloned black-footed ferret at the Smithsonian’s National Zoo and Conservation Biology Institute who became the first cloned ferret to give birth worldwide.

Black-footed ferret

Also known as American polecats, these are carnivorous relatives of weasels with dark patches around their eyes and paws, and are among the most endangered mammals in North America.

Sibert and Red Cloud

The names of the two surviving healthy offspring (kits) produced by the cloned ferret Antonia in the summer of 2024.

National Zoo and Conservation Biology Institute (NZCBI)

The Smithsonian facility located in Front Royal, Virginia, where the historic birth of Antonia's kits took place.

Willa

A black-footed ferret who died in 1988 and whose preserved genetic material contains three times more genetic diversity than currently living ferrets.

Frozen Zoo

The facility at the San Diego Zoo Wildlife Alliance where tissue samples from Willa were collected and preserved in 1988.

Somatic cell nuclear transfer

A cloning technique involving the injection of genetic material into the egg of a surrogate mother, used to create the clones of Willa.

Elizabeth Ann

The first cloned black-footed ferret in the world, born in 2020, who was ultimately unable to reproduce.

Noreen

A black-footed ferret born in May 2023 who is the genetic twin of Antonia and Elizabeth Ann.

Urchin

A 3-year-old male black-footed ferret at the Smithsonian’s NZCBI who successfully mated with Antonia.

Genetic diversity

Described by Megan Owen as the raw material of adaptive evolution, it is critical for providing resilience to environmental change in a population.

Genetic bottlenecks

A threat to species longevity that occurs when a population, such as the current black-footed ferret population, descends from a very small number of individuals (seven, in this case).

Paul Marinari

The senior curator at the Smithsonian’s NZCBI who identified the birth of Antonia’s kits as a major milestone in endangered species conservation.

Ryan Phelan

The co-founder and executive director of Revive & Restore who stated that cloning has now definitively contributed meaningful genetic variation back into a breeding population.