flipper

The development of a claw or a flipper requires many particular different genes.

By phenotype, Sackton means the actual expression of that trait, like having flippers or engaging in gaze following, as opposed to its genotype, meaning the genetic makeup that results in that trait.

She was always more of a flipper than a twister, and Dennis sometimes landed on her neck from over-rotating her warm-up drills.

Instead of flippers, a robot has an electrode on each corner.

Ariel, who was named for “The Little Mermaid” character because the additional appendage with two paws on the end looked a flipper, ran through the grass Saturday as she adjusted to life on four legs.